diff --git a/apiMirror.php b/apiMirror.php
index 9320c7b..df27ee9 100644
--- a/apiMirror.php
+++ b/apiMirror.php
@@ -13,12 +13,12 @@ require_once __DIR__ . "/inc/functions.php";
 // Check validity of request.
 
 if (!isset($_GET['args']) || !isset($_GET['area'])) {
-    echo printErrorPage("File does not exist.");
+    echo printErrorPage($settings, "File does not exist.");
     return;
 }
 
 if (!in_array($_GET['area'], ['events', 'exhibitions'])) {
-    echo printErrorPage("Using a disallowed value for area.");
+    echo printErrorPage($settings, "Using a disallowed value for area.");
     return;
 }
 
diff --git a/collection.php b/collection.php
index 1662ce8..891ddcc 100644
--- a/collection.php
+++ b/collection.php
@@ -13,7 +13,7 @@ require_once __DIR__ . "/inc/functions.php";
 // Check validity of request.
 
 if (!isset($_GET['id']) or !is_numeric($_GET['id'])) {
-    echo printErrorPage("Collection does not exist.");
+    echo printErrorPage($settings, "Collection does not exist.");
     return;
 }
 
@@ -27,12 +27,12 @@ $pages = loadPublicPages();           // Load overview of pages.
 $contents = json_decode(queryCachePage($settings['mdVersion'] . "?t=sammlung&gesusa=" . urlencode($_GET['id']) . "&output=json", "institution", $settings), true);
 
 if (!$contents || (isset($contents[0]) and $contents[0] == "There is no collection with this ID yet.")) {
-    echo printErrorPage("Temporarily unavailable.");
+    echo printErrorPage($settings, "Temporarily unavailable.");
     return;
 }
 
 if ($settings['limitToInstitutions'] != [] and !in_array($contents['collection_id'], $settings['limitToInstitutions'])) {
-    echo printErrorPage("This collection does not belong to an enabled institution.");
+    echo printErrorPage($settings, "This collection does not belong to an enabled institution.");
     return;
 }
 
diff --git a/edit/editHTMLPage.php b/edit/editHTMLPage.php
index 0e3c118..2f5038c 100644
--- a/edit/editHTMLPage.php
+++ b/edit/editHTMLPage.php
@@ -30,11 +30,11 @@ loadHttpToGlobals(["id", "task", "content"]);
 define("targetFile", __DIR__ . "/../data/$id.htm");
 
 if (!isset($id) or !in_array($id, ['footer', 'aside', 'banner', 'welcomeMsg'])) {
-    echo printErrorPage($translations['specifyToEdit']); return;
+    echo printErrorPage($settings, $translations['specifyToEdit']); return;
 }
 
 if ($id == 'welcomeMsg' and !$_SESSION['admin']) {
-    echo printErrorPage($translations['accessDenied']); return;
+    echo printErrorPage($settings, $translations['accessDenied']); return;
 }
 
 // Read file contents if there is no new content sent by $_POST.
diff --git a/edit/files.php b/edit/files.php
index cc1ca20..db3aa06 100644
--- a/edit/files.php
+++ b/edit/files.php
@@ -81,17 +81,17 @@ else if ($task == "upload") {
 
     // Whitelist of allowed types.
     if (!in_array($_FILES['file']['type'], $allowedFiletypes)) {
-        printErrorPage($translations['filetypeNotWhitelisted']);
+        echo printErrorPage($settings, $translations['filetypeNotWhitelisted']);
         return;
     }
 
-    if (filesize($_FILES['file']['tmp_name']) > 300000) {
-        printErrorPage($translations['fileTooLarge']);
+    if (filesize($_FILES['file']['tmp_name']) > $settings['maxFileSize']) {
+        echo printErrorPage($settings, $translations['fileTooLarge']);
         return;
     }
 
     if (!(move_uploaded_file($_FILES['file']['tmp_name'], $uploadfile))) {
-        printErrorPage($translations['fileUploadError']);
+        echo printErrorPage($settings, $translations['fileUploadError']);
         return;
     }
 
@@ -106,7 +106,7 @@ else if ($task == "upload") {
 else if ($task == "delete") {
 
     if (!is_file(fileDir . "/$subject")) {
-        printErrorPage($translations['fileDoesNotExist']); return;
+        echo printErrorPage($settings, $translations['fileDoesNotExist']); return;
     }
 
     unlink(fileDir . "/$subject");
diff --git a/edit/js/main.js b/edit/js/main.js
index cf54c38..e2fc898 100644
--- a/edit/js/main.js
+++ b/edit/js/main.js
@@ -214,11 +214,6 @@ document.addEventListener("DOMContentLoaded", function() {
             uploadLabel.textContent = getTranslation(translations, "uploadFile");
             uploadLabel.for = "fileUploadInput";
 
-            let uploadSize = document.createElement("input");
-            uploadSize.type = "hidden";
-            uploadSize.name = "MAX_FILE_SIZE";
-            uploadSize.value = "300000";
-
             let uploadBackTo = document.createElement("input");
             uploadBackTo.type = "hidden";
             uploadBackTo.name = "backTo";
@@ -233,13 +228,13 @@ document.addEventListener("DOMContentLoaded", function() {
             uploadInput.type = "file";
             uploadInput.id = "fileUploadInput";
             uploadInput.name = "file";
+            uploadInput.value = "";
 
             let uploadButton = document.createElement("button");
             uploadButton.type = "submit";
             uploadButton.textContent = getTranslation(translations, "submit");
 
             uploadForm.appendChild(uploadLabel);
-            uploadForm.appendChild(uploadSize);
             uploadForm.appendChild(uploadTask);
             uploadForm.appendChild(uploadBackTo);
             uploadForm.appendChild(uploadInput);
diff --git a/edit/page.php b/edit/page.php
index 9d8c362..353ea7e 100644
--- a/edit/page.php
+++ b/edit/page.php
@@ -62,7 +62,7 @@ if (isset($task)) {
     else if ($task == "delete") {
 
         if (!isset($id)) {
-            echo printErrorPage($translations['specifyToDelete']); return;
+            echo printErrorPage($settings, $translations['specifyToDelete']); return;
         }
 
         unlink(__DIR__ . "/../data/static/$id.json");
diff --git a/edit/settings.php b/edit/settings.php
index af91695..6da2dd8 100644
--- a/edit/settings.php
+++ b/edit/settings.php
@@ -17,7 +17,7 @@ ensureBackendEnv();                                     // Ensure session is sta
 $pages = loadPages();                                   // Load overview of pages.
 
 if (!$_SESSION['admin']) {
-    echo printErrorPage($translations['accessDenied']); return;
+    echo printErrorPage($settings, $translations['accessDenied']); return;
 }
 
 /*
diff --git a/edit/translations/de.php b/edit/translations/de.php
index b262968..186c3e9 100644
--- a/edit/translations/de.php
+++ b/edit/translations/de.php
@@ -126,4 +126,5 @@ $translations['deletedFile'] = 'Datei wurde gelöscht';
 $translations['uploadedFile'] = 'Datei wurde heraufgeladen';
 $translations['fileUploadError'] = 'Ein Fehler ist aufgetreten';
 $translations['filetypeNotWhitelisted'] = 'Dateityp ist nicht erlaubt';
+$translations['fileTooLarge'] = 'Die Datei ist zu groß';
 ?>
\ No newline at end of file
diff --git a/edit/translations/en.php b/edit/translations/en.php
index 2085890..0a5c58f 100644
--- a/edit/translations/en.php
+++ b/edit/translations/en.php
@@ -126,4 +126,5 @@ $translations['deletedFile'] = 'Deleted file';
 $translations['uploadedFile'] = 'Uploaded file';
 $translations['fileUploadError'] = 'Error uploading file';
 $translations['filetypeNotWhitelisted'] = 'Filetype is not in whitelist';
+$translations['fileTooLarge'] = 'The file is too large.';
 ?>
\ No newline at end of file
diff --git a/edit/users.php b/edit/users.php
index 0a4cb63..0710215 100644
--- a/edit/users.php
+++ b/edit/users.php
@@ -17,7 +17,7 @@ ensureBackendEnv();                                     // Ensure session is sta
 $pages = loadPages();                                   // Load overview of pages.
 
 if (!$_SESSION['admin']) {
-    echo printErrorPage($translations['accessDenied']); return;
+    echo printErrorPage($settings, $translations['accessDenied']); return;
 }
 
 /*
diff --git a/event.php b/event.php
index 86f7a14..9e4420c 100644
--- a/event.php
+++ b/event.php
@@ -13,7 +13,7 @@ require_once __DIR__ . "/inc/functions.php";
 // Check validity of request.
 
 if (!isset($_GET['id']) or !is_numeric($_GET['id'])) {
-    echo printErrorPage("Exhibition does not exist.");
+    echo printErrorPage($settings, "Exhibition does not exist.");
     return;
 }
 
@@ -25,12 +25,12 @@ $pages = loadPublicPages();           // Load overview of pages.
 $contents = json_decode(queryCachePage($settings['mdVersion'] . "?t=event&id=" . urlencode($_GET['id']) . "&output=json", "event", $settings), true);
 
 if (!$contents || (isset($contents[0]) and $contents[0] == "There is no event with this ID yet.")) {
-    echo printErrorPage("Temporarily unavailable.");
+    echo printErrorPage($settings, "Temporarily unavailable.");
     return;
 }
 
 if ($settings['limitToInstitutions'] != [] and !in_array($contents['institution_id'], $settings['limitToInstitutions'])) {
-    echo printErrorPage("This exhibition does not belong to an enabled institution.");
+    echo printErrorPage($settings, "This exhibition does not belong to an enabled institution.");
     return;
 }
 
diff --git a/exhibition.php b/exhibition.php
index 5d2785b..427c39d 100644
--- a/exhibition.php
+++ b/exhibition.php
@@ -13,7 +13,7 @@ require_once __DIR__ . "/inc/functions.php";
 // Check validity of request.
 
 if (!isset($_GET['id']) or !is_numeric($_GET['id'])) {
-    echo printErrorPage("Exhibition does not exist.");
+    echo printErrorPage($settings, "Exhibition does not exist.");
     return;
 }
 
@@ -25,12 +25,12 @@ $pages = loadPublicPages();           // Load overview of pages.
 $contents = json_decode(queryCachePage($settings['mdVersion'] . "?t=exhibition&id=" . urlencode($_GET['id']) . "&output=json", "exhibition", $settings), true);
 
 if (!$contents || (isset($contents[0]) and $contents[0] == "There is no exhibition with this ID yet.")) {
-    echo printErrorPage("Temporarily unavailable.");
+    echo printErrorPage($settings, "Temporarily unavailable.");
     return;
 }
 
 if ($settings['limitToInstitutions'] != [] and !in_array($contents['institution_id'], $settings['limitToInstitutions'])) {
-    echo printErrorPage("This exhibition does not belong to an enabled institution.");
+    echo printErrorPage($settings, "This exhibition does not belong to an enabled institution.");
     return;
 }
 
diff --git a/inc/functions.php b/inc/functions.php
index aeb0926..8b884f2 100644
--- a/inc/functions.php
+++ b/inc/functions.php
@@ -83,7 +83,7 @@ function ensureEnvironment() {
             "sendHTTPHeaders"       => 1,
             "CSPimageSources"       => "",
             "CSPobjectSources"      => "",
-            "maxFileSize"           => 300000,
+            "maxFileSize"           => 300000000,
         ],
         json_decode(file_get_contents(__DIR__ . "/../data/settings.json"), true)
     );
@@ -138,7 +138,8 @@ function queryCachePage(string $url, string $area = "", array $settings = ['cach
 
     // Ignore caching if cacheRefreshInterval equals zero.
     if ($settings['cacheRefreshInterval'] == 0) {
-        return file_get_contents($url);
+        $content = file_get_contents($url);
+        return $content;
     }
 
     $fileDir = __DIR__ . "/../data/caches/$area";
diff --git a/inc/mdEmbeds.php b/inc/mdEmbeds.php
index e772dca..1b86edd 100644
--- a/inc/mdEmbeds.php
+++ b/inc/mdEmbeds.php
@@ -33,52 +33,56 @@ function checkForEmbeds(string $text, array $settings):string {
 
     foreach ($embedOptions as $option) {
 
-        if (strpos($text, $option) === false) continue;
-        $position = strpos($text, $option) - 1;
+        $i = 0;
+        while (strpos($text, $option) !== false) {
+            $position = strpos($text, $option) - 1;
 
-        $nextTag = $nextWhitespace = strlen($text);
-        if (strpos($text, "<", $position) !== false) $nextTag        = strpos($text, "<", $position);
-        if (strpos($text, " ", $position) !== false) $nextWhitespace = strpos($text, " ", $position);
+            $nextTag = $nextWhitespace = $nextNBSP = strlen($text);
+            if (strpos($text, "<", $position) !== false)      $nextTag        = strpos($text, "<", $position);
+            if (strpos($text, " ", $position) !== false)      $nextWhitespace = strpos($text, " ", $position);
+            if (strpos($text, "&nbsp;", $position) !== false) $nextNBSP       = strpos($text, "&nbsp;", $position);
 
-        $end = min($nextTag, $nextWhitespace);
+            // The pseudocode ends with a whitespace. No two tiles can be immediately after each other.
+            $end = min($nextTag, $nextWhitespace, $nextNBSP);
 
-        $pseudocode = substr($text, $position, $end - $position);
+            $pseudocode = substr($text, $position, $end - $position);
 
-        $command   = substr($pseudocode, 1, strpos($pseudocode, "]") - 1);
-        $arguments = [];
-        if (strpos($pseudocode, "{") !== false) $arguments = explode("&", substr($pseudocode, strpos($pseudocode, "{") + 1, -1));
+            $command   = substr($pseudocode, 1, strpos($pseudocode, "]") - 1);
+            $arguments = [];
+            if (strpos($pseudocode, "{") !== false) $arguments = explode("&", substr($pseudocode, strpos($pseudocode, "{") + 1, -1));
 
-        switch ($command) {
-        case "singleObjectTile":
-            $text = str_replace($pseudocode, embedObject($arguments, $settings), $text);
-            break;
-        case "singleObjectDetails":
-            $text = str_replace($pseudocode, embedObject($arguments, $settings, true), $text);
-            break;
-        case "singleCollectionTile":
-            $text = str_replace($pseudocode, embedCollection($arguments, $settings), $text);
-            break;
-        case "singleCollectionDetails":
-            $text = str_replace($pseudocode, embedCollection($arguments, $settings, true), $text);
-            break;
-        case "singleInstitutionTile":
-            $text = str_replace($pseudocode, embedInstitution($arguments, $settings), $text);
-            break;
-        case "singleInstitutionDetails":
-            $text = str_replace($pseudocode, embedInstitution($arguments, $settings, true), $text);
-            break;
-        case "exhibitionCalendar":
-            $text = str_replace($pseudocode, embedExhibitionCalendar($arguments), $text);
-            break;
-        case "singleExhibitionDetails":
-            $text = str_replace($pseudocode, embedExhibition($arguments, $settings, true), $text);
-            break;
-        case "eventCalendar":
-            $text = str_replace($pseudocode, embedEventCalendar($arguments), $text);
-            break;
-        case "singleEventDetails":
-            $text = str_replace($pseudocode, embedEvent($arguments, $settings, true), $text);
-            break;
+            switch ($command) {
+            case "singleObjectTile":
+                $text = str_replace($pseudocode, embedObject($arguments, $settings), $text);
+                break;
+            case "singleObjectDetails":
+                $text = str_replace($pseudocode, embedObject($arguments, $settings, true), $text);
+                break;
+            case "singleCollectionTile":
+                $text = str_replace($pseudocode, embedCollection($arguments, $settings), $text);
+                break;
+            case "singleCollectionDetails":
+                $text = str_replace($pseudocode, embedCollection($arguments, $settings, true), $text);
+                break;
+            case "singleInstitutionTile":
+                $text = str_replace($pseudocode, embedInstitution($arguments, $settings), $text);
+                break;
+            case "singleInstitutionDetails":
+                $text = str_replace($pseudocode, embedInstitution($arguments, $settings, true), $text);
+                break;
+            case "exhibitionCalendar":
+                $text = str_replace($pseudocode, embedExhibitionCalendar($arguments), $text);
+                break;
+            case "singleExhibitionDetails":
+                $text = str_replace($pseudocode, embedExhibition($arguments, $settings, true), $text);
+                break;
+            case "eventCalendar":
+                $text = str_replace($pseudocode, embedEventCalendar($arguments), $text);
+                break;
+            case "singleEventDetails":
+                $text = str_replace($pseudocode, embedEvent($arguments, $settings, true), $text);
+                break;
+            }
         }
 
     }
diff --git a/inc/standardHTML.php b/inc/standardHTML.php
index bdc7fa6..99d9a68 100644
--- a/inc/standardHTML.php
+++ b/inc/standardHTML.php
@@ -134,11 +134,12 @@ function printStaticPagePart(string $file, string $elem):string {
 /**
  * This function prints an error page.
  *
- * @param string $content The error message.
+ * @param array  $settings General site settings / including the CSS.
+ * @param string $content  The error message.
  *
  * @return string
  */
-function printErrorPage(string $content):string {
+function printErrorPage(array $settings, string $content):string {
 
     $output = '
 <!DOCTYPE html>
@@ -149,7 +150,7 @@ function printErrorPage(string $content):string {
         <meta http-equiv="content-type" content="text/html;charset=utf-8" />
         <meta charset="UTF-8" />
         <title>' . $content . '</title>
-        <link rel="stylesheet" type="text/css" href="themes/default/default.css" />
+        <link rel="stylesheet" type="text/css" href="themes/' . $settings['css'] . '/theme.css" />
     </head>
     <body>
 
diff --git a/index.php b/index.php
index 3a8d4f1..e5f4ed9 100644
--- a/index.php
+++ b/index.php
@@ -12,7 +12,7 @@ require_once __DIR__ . "/inc/functions.php";
 // Check validity of request.
 
 if (isset($_GET['id']) and !file_exists(__DIR__ . "/data/static/" . $_GET['id'] . ".json")) {
-    echo printErrorPage("File does not exist.");
+    echo printErrorPage($settings, "File does not exist.");
     return;
 }
 
@@ -35,7 +35,7 @@ else if (file_exists(__DIR__ . "/data/static/" . $settings['startPage'] . ".json
     $id = $settings['startPage'];
 }
 else {
-    echo printErrorPage("This file does not exist.");
+    echo printErrorPage($settings, "This file does not exist.");
     return;
 }
 
diff --git a/institution.php b/institution.php
index e92acbe..9d75418 100644
--- a/institution.php
+++ b/institution.php
@@ -13,7 +13,7 @@ require_once __DIR__ . "/inc/functions.php";
 // Check validity of request.
 
 if (!isset($_GET['id']) or !is_numeric($_GET['id'])) {
-    echo printErrorPage("Institution does not exist.");
+    echo printErrorPage($settings, "Institution does not exist.");
     return;
 }
 
@@ -25,12 +25,12 @@ $pages = loadPublicPages();           // Load overview of pages.
 $contents = json_decode(queryCachePage($settings['mdVersion'] . "?t=institution&instnr=" . urlencode($_GET['id']) . "&output=json", "institution", $settings), true);
 
 if (!$contents || (isset($contents[0]) and $contents[0] == "There is no institution with this ID yet.")) {
-    echo printErrorPage("Temporarily unavailable.");
+    echo printErrorPage($settings, "Temporarily unavailable.");
     return;
 }
 
 if ($settings['limitToInstitutions'] != [] and !in_array($_GET['id'], $settings['limitToInstitutions'])) {
-    echo printErrorPage("This object does not belong to an enabled institution.");
+    echo printErrorPage($settings, "This object does not belong to an enabled institution.");
     return;
 }
 
diff --git a/object.php b/object.php
index 5845463..59b4c4e 100644
--- a/object.php
+++ b/object.php
@@ -12,7 +12,7 @@ require_once __DIR__ . "/inc/functions.php";
 // Check validity of request.
 
 if (!isset($_GET['id']) or !is_numeric($_GET['id'])) {
-    echo printErrorPage("Object does not exist.");
+    echo printErrorPage($settings, "Object does not exist.");
     return;
 }
 
@@ -24,12 +24,12 @@ $pages = loadPublicPages();           // Load overview of pages.
 $contents = json_decode(queryCachePage($settings['mdVersion'] . "?t=objekt&oges=" . urlencode($_GET['id']) . "&output=json", "object", $settings), true);
 
 if (!$contents || (isset($contents[0]) and $contents[0] == "There is no object with this ID yet.")) {
-    echo printErrorPage("Temporarily unavailable.");
+    echo printErrorPage($settings, "Temporarily unavailable.");
     return;
 }
 
 if ($settings['limitToInstitutions'] != [] and !in_array($contents['object_institution']['institution_id'], $settings['limitToInstitutions'])) {
-    echo printErrorPage("This object does not belong to an enabled institution.");
+    echo printErrorPage($settings, "This object does not belong to an enabled institution.");
     return;
 }