diff --git a/recipe/0318-navPlace-navDate/collection.json b/recipe/0318-navPlace-navDate/collection.json
index 2fca78771..4bcc034f7 100644
--- a/recipe/0318-navPlace-navDate/collection.json
+++ b/recipe/0318-navPlace-navDate/collection.json
@@ -1,5 +1,8 @@
 {
-    "@context": "http://iiif.io/api/presentation/3/context.json",
+    "@context": [
+      "http://iiif.io/api/extension/navplace/context.json",
+      "http://iiif.io/api/presentation/3/context.json"
+    ],
     "id": "{{ id.url }}",
     "type": "Collection",
     "label": { "en": [ "NavPlace and NavDate Collection" ] },
@@ -16,7 +19,32 @@
           "en": [
             "Castel Sant'Angelo, Rome"
           ]
+        },
+    "navDate": "1776-01-01T00:00:00+00:00",
+    "navPlace": {
+      "id": "{{ id.path }}/feature-collection/1",
+      "type": "FeatureCollection",
+      "features": [
+        {
+          "id": "{{ id.path }}/feature/1",
+          "type": "Feature",
+          "properties": {
+            "label": {
+              "en": [
+                "Castel Sant'Angelo, Rome"
+              ]
+            }
+          },
+          "geometry": {
+            "type": "Point",
+            "coordinates": [
+              12.4663, 
+              41.9031  
+            ]
+          }
         }
+      ]
+    }
       },
       {
         "id": "{{ id.path }}/manifest-2.json",
@@ -25,6 +53,31 @@
           "en": [
             "The Colosseum"
           ]
+    },
+    "navDate": "1776-01-01T00:00:00+00:00",
+    "navPlace": {
+      "id": "{{ id.path }}/feature-collection/2",
+      "type": "FeatureCollection",
+      "features": [
+        {
+          "id": "{{ id.path }}/feature/2",
+          "type": "Feature",
+          "properties": {
+            "label": {
+              "en": [
+                "The Colosseum"
+              ]
+            }
+          },
+          "geometry": {
+            "type": "Point",
+            "coordinates": [
+              12.492222,
+              41.890278
+            ]
+          }
+        }
+      ]
         }
       },
       {
@@ -34,6 +87,31 @@
           "en": [
             "The Arch of Titus from the Forum, Rome, ca. 1725"
           ]
+    },
+    "navDate": "1725-01-01T00:00:00+00:00",
+    "navPlace": {
+      "id": "{{ id.path }}/feature-collection/3",
+      "type": "FeatureCollection",
+      "features": [
+        {
+          "id": "{{ id.path }}/feature/3",
+          "type": "Feature",
+          "properties": {
+            "label": {
+              "en": [
+                "The Arch of Titus from the Forum, Rome, ca. 1725"
+              ]
+            }
+          },
+          "geometry": {
+            "type": "Point",
+            "coordinates": [
+              12.488585,
+              41.890717  
+            ]
+          }
+        }
+      ]
         }
       },
       {
@@ -43,6 +121,31 @@
           "en": [
             "The Temple of Vesta, Rome, 1849"
           ]
+    },
+    "navDate": "1849-01-01T00:00:00+00:00",
+    "navPlace": {
+      "id": "{{ id.path }}/feature-collection/4",
+      "type": "FeatureCollection",
+      "features": [
+        {
+          "id": "{{ id.path }}/feature/4",
+          "type": "Feature",
+          "properties": {
+            "label": {
+              "en": [
+                "The Temple of Vesta, Rome, 1849"
+              ]
+            }
+          },
+          "geometry": {
+            "type": "Point",
+            "coordinates": [
+              12.4862,
+              41.8917     
+            ]
+          }
+        }
+      ]
         }
       },
       {
@@ -52,6 +155,31 @@
           "en": [
             "A View of Trajan's Forum, Rome, 1821"
           ]
+    },
+    "navDate": "1821-01-01T00:00:00+00:00",
+    "navPlace": {
+      "id": "{{ id.path }}/feature-collection/5",
+      "type": "FeatureCollection",
+      "features": [
+        {
+          "id": "{{ id.path }}/feature/5",
+          "type": "Feature",
+          "properties": {
+            "label": {
+              "en": [
+                "A View of Trajan's Forum, Rome, 1821"
+              ]
+            }
+          },
+          "geometry": {
+            "type": "Point",
+            "coordinates": [
+              12.485869,
+              41.895419    
+            ]
+          }
+        }
+      ]
         }
       }
     ]