diff --git a/3DGeoVolumes/collections/Stuttgart/Stuttgart.json b/3DGeoVolumes/collections/Stuttgart/Stuttgart.json
index 2644d4fc84c90771806f3ff933681a118853bd76..81715ecb51b6f087ce46db8055aac3f1f70b1c0f 100644
--- a/3DGeoVolumes/collections/Stuttgart/Stuttgart.json
+++ b/3DGeoVolumes/collections/Stuttgart/Stuttgart.json
@@ -41,56 +41,91 @@
           }
         ],
         "children": [
-            {
-                "id": "Stuttgart_LOD2_Stadtmitte",
-                "title": "Stuttgart 3D Models LOD2 Stadtmitte Demo",
-                "description": "All Supported 3D Containers for the city of Stuttgart 3D Models LOD2 Stadtmitte",
-                "collectiontype": "3d-container",
-                "extent": {
-                  "spatial": {
-                    "bbox": [
-                      [9.161434,48.771841,-10,9.183426,48.786318,550]
-                    ],
-                    "crs": "http://www.opengis.net/def/crs/OGC/0/CRS84h"
-                  }
-                },
-                "links": [
-                  {
-                    "rel": "collections",
-                    "href": "host_url/collections/",
-                    "type": "application/json"
-                  },
-                  {
-                    "title": "Stuttgart LOD2 Stadtmitte - Collections",
-                    "rel": "self",
-                    "href": "host_url/collections/Stuttgart/Stuttgart_LOD2_Stadtmitte",
-                    "type": "application/json"
-                  },
-                  {
-                    "title": "Stuttgart LOD2 Stadtmitte : 3D Tiles",
-                    "rel": "items",
-                    "href": "http://193.196.37.89:8092/AssetsHFT/3DTile_Stuttgart_City_LoD2_InnenStadt_ClampToGround/tileset.json",
-                    "type": "application/json+3dtiles"
-                  }
-                ],
-                "children": [
-                  
+          {
+            "id": "HFTBuilding2_3DModel",
+            "title": "HFT Building 2 - 3D Model",
+            "description": "3D Building Model of the HFT Stuttgart created by SketchUp and converted with CityEngine and FME.",
+            "collectiontype": "3d-container",
+            "extent": {
+              "spatial": {
+                "bbox": [
+                  [
+                    9.1729205436,
+                    48.7794377214,
+                    -10,
+                    9.1738475153,
+                    48.7802408522,
+                    550
+                  ]
                 ],
-                "content": [
-                  {
-                    "title": "Stuttgart LOD2 Stadtmitte - Collections",
-                    "rel": "original",
-                    "href": "host_url/collections/Stuttgart/Stuttgart_LOD2_Stadtmitte",
-                    "type": "application/json"
-                  },
-                  {
-                    "title": "Stuttgart LOD2 Stadtmitte : 3D Tiles",
-                    "rel": "original",
-                    "href": "http://193.196.37.89:8092/AssetsHFT/3DTile_Stuttgart_City_LoD2_InnenStadt_ClampToGround/tileset.json",
-                    "type": "application/json+3dtiles"
-                  }
-                ]
+                "crs": "http://www.opengis.net/def/crs/OGC/0/CRS84h"
+              }
+            },
+            "links": [
+              {
+                "rel": "collections",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/",
+                "type": "application/json"
+              },
+              {
+                "title": "Stuttgart Collections",
+                "rel": "self",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart",
+                "type": "application/json"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: i3s",
+                "rel": "items",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/i3s",
+                "type": "application/json+i3s"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: 3D Tiles",
+                "rel": "items",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/3dtiles",
+                "type": "application/json+3dtiles"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: USDZ",
+                "rel": "items",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/usdz",
+                "type": "application/usdz"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: gltf",
+                "rel": "items",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/gltf",
+                "type": "application/gltf"
               }
+            ],
+            "children": [],
+            "content": [
+              {
+                "title": "HFT Building 2 - 3D Model: i3s",
+                "rel": "items",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/i3s",
+                "type": "application/json+i3s"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: 3D Tiles",
+                "rel": "original",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/3dtiles",
+                "type": "application/json+3dtiles"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: USDZ",
+                "rel": "original",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/usdz",
+                "type": "application/usdz"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: gltf",
+                "rel": "original",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/gltf",
+                "type": "application/gltf"
+              }
+            ]
+          }
         ],
         "content": [
           {
diff --git a/3DGeoVolumes/collections/collections.json b/3DGeoVolumes/collections/collections.json
index 4ed1273af5bf14ccc8a3b723d586d6d027cebf92..742198f3928768f11e450dcabb760872086279db 100644
--- a/3DGeoVolumes/collections/collections.json
+++ b/3DGeoVolumes/collections/collections.json
@@ -105,14 +105,21 @@
         ],
         "children": [
           {
-            "id": "Stuttgart_LOD2_Stadtmitte",
-            "title": "Stuttgart 3D Models LOD2 Stadtmitte Demo",
-            "description": "All Supported 3D Containers for the city of Stuttgart 3D Models LOD2 Stadtmitte",
+            "id": "HFTBuilding2_3DModel",
+            "title": "HFT Building 2 - 3D Model",
+            "description": "3D Building Model of the HFT Stuttgart created by SketchUp and converted with CityEngine and FME.",
             "collectiontype": "3d-container",
             "extent": {
               "spatial": {
                 "bbox": [
-                  [9.161434,48.771841,-10,9.183426,48.786318,550]
+                  [
+                    9.1729205436,
+                    48.7794377214,
+                    -10,
+                    9.1738475153,
+                    48.7802408522,
+                    550
+                  ]
                 ],
                 "crs": "http://www.opengis.net/def/crs/OGC/0/CRS84h"
               }
@@ -120,37 +127,65 @@
             "links": [
               {
                 "rel": "collections",
-                "href": "host_url/collections/",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/",
                 "type": "application/json"
               },
               {
-                "title": "Stuttgart LOD2 Stadtmitte - Collections",
+                "title": "Stuttgart Collections",
                 "rel": "self",
-                "href": "host_url/collections/Stuttgart/Stuttgart_LOD2_Stadtmitte",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart",
                 "type": "application/json"
               },
               {
-                "title": "Stuttgart LOD2 Stadtmitte : 3D Tiles",
+                "title": "HFT Building 2 - 3D Model: i3s",
                 "rel": "items",
-                "href": "http://193.196.37.89:8092/AssetsHFT/3DTile_Stuttgart_City_LoD2_InnenStadt_ClampToGround/tileset.json",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/i3s",
+                "type": "application/json+i3s"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: 3D Tiles",
+                "rel": "items",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/3dtiles",
                 "type": "application/json+3dtiles"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: USDZ",
+                "rel": "items",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/usdz",
+                "type": "application/usdz"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: gltf",
+                "rel": "items",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/gltf",
+                "type": "application/gltf"
               }
             ],
-            "children": [
-              
-            ],
+            "children": [],
             "content": [
               {
-                "title": "Stuttgart LOD2 Stadtmitte - Collections",
-                "rel": "original",
-                "href": "host_url/collections/Stuttgart/Stuttgart_LOD2_Stadtmitte",
-                "type": "application/json"
+                "title": "HFT Building 2 - 3D Model: i3s",
+                "rel": "items",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/i3s",
+                "type": "application/json+i3s"
               },
               {
-                "title": "Stuttgart LOD2 Stadtmitte : 3D Tiles",
+                "title": "HFT Building 2 - 3D Model: 3D Tiles",
                 "rel": "original",
-                "href": "http://193.196.37.89:8092/AssetsHFT/3DTile_Stuttgart_City_LoD2_InnenStadt_ClampToGround/tileset.json",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/3dtiles",
                 "type": "application/json+3dtiles"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: USDZ",
+                "rel": "original",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/usdz",
+                "type": "application/usdz"
+              },
+              {
+                "title": "HFT Building 2 - 3D Model: gltf",
+                "rel": "original",
+                "href": "https://steinbeis-3dps.eu/3DGeoVolumes/collections/Stuttgart/HFTBuilding2_3DModel/gltf",
+                "type": "application/gltf"
               }
             ]
           }
diff --git a/server.js b/server.js
index 52f368243ac1ff2801e4c258579a990a3218a82b..60b4f6480954bf72fdee7969f3f93da7a72450dd 100644
--- a/server.js
+++ b/server.js
@@ -147,22 +147,19 @@
             var collection_json = require(`./3DGeoVolumes/collections/${req.params.collectionsId}/${req.params.collectionsId}.json`)
             res.json(collection_json);
         } catch (error) {
-            res.send("internal error at /3DGeoVolumes/collections/:collectionsId")
+            console.log(error)
+            res.send("internal error")
         }
     })
     // request 3D Tiles
     app.get('/collections/:collectionsId/3dtiles', function (req, res) {
         try {
-            if (req.params.collectionsId == "Stuttgart_LOD2_Stadtmitte") {
-                res.redirect("http://193.196.37.89:8092/AssetsHFT/3DTile_Stuttgart_City_LoD2_InnenStadt_ClampToGround/tileset.json")
-            } else {
                 var collections_3dtiles_json = require(`./3DGeoVolumes/collections/${req.params.collectionsId}/3dtiles/tileset.json`)
                 var collections_3dtiles_output = replace_server_url(collections_3dtiles_json)
                 res.json(collections_3dtiles_output);
-            }
         } catch (error) {
             console.log(error)
-            res.send("internal error at /3DGeoVolumes/collections/:collectionsId/3dtiles")
+            res.send("internal error")
         }
     })