diff --git a/src/fellchensammlung/migrations/0033_rescueorganization_external_object_identifier_and_more.py b/src/fellchensammlung/migrations/0033_rescueorganization_external_object_identifier_and_more.py
new file mode 100644
index 0000000..36347ab
--- /dev/null
+++ b/src/fellchensammlung/migrations/0033_rescueorganization_external_object_identifier_and_more.py
@@ -0,0 +1,23 @@
+# Generated by Django 5.1.4 on 2025-01-05 18:18
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('fellchensammlung', '0032_searchsubscription_created_at_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='rescueorganization',
+            name='external_object_identifier',
+            field=models.CharField(blank=True, max_length=200, null=True, verbose_name='External Object Identifier'),
+        ),
+        migrations.AddField(
+            model_name='rescueorganization',
+            name='external_source_identifier',
+            field=models.CharField(blank=True, choices=[('OSM', 'Open Street Map')], max_length=200, null=True, verbose_name='External Source Identifier'),
+        ),
+    ]
diff --git a/src/fellchensammlung/models.py b/src/fellchensammlung/models.py
index f9858f8..7d4cb5f 100644
--- a/src/fellchensammlung/models.py
+++ b/src/fellchensammlung/models.py
@@ -1,4 +1,5 @@
 import uuid
+from random import choices
 
 from django.db import models
 from django.urls import reverse
@@ -81,6 +82,8 @@ class Location(models.Model):
         instance.location = location
         instance.save()
 
+class ExternalSourceChoices(models.TextChoices):
+    OSM = "OSM", _("Open Street Map")
 
 class RescueOrganization(models.Model):
     def __str__(self):
@@ -118,6 +121,10 @@ class RescueOrganization(models.Model):
     created_at = models.DateTimeField(auto_now_add=True)
     internal_comment = models.TextField(verbose_name=_("Interner Kommentar"), null=True, blank=True, )
     description = models.TextField(null=True, blank=True, verbose_name=_('Beschreibung'))  # Markdown allowed
+    external_object_identifier = models.CharField(max_length=200, null=True, blank=True, verbose_name=_('External Object Identifier'))
+    external_source_identifier = models.CharField(max_length=200, null=True, blank=True,
+                                                  choices=ExternalSourceChoices.choices,
+                                                  verbose_name=_('External Source Identifier'))
 
     def get_absolute_url(self):
         return reverse("rescue-organization-detail", args=[str(self.pk)])