diff --git a/src/Speckle.Core/Models/Collection.cs b/src/Speckle.Core/Models/Collection.cs
index c5d45436..6f9f315a 100644
--- a/src/Speckle.Core/Models/Collection.cs
+++ b/src/Speckle.Core/Models/Collection.cs
@@ -33,8 +33,11 @@ public Collection(string name, string collectionType)
   public string name { get; set; }
 
   /// <summary>
-  /// The type of this collection
+  /// The type of this collection. Note: Claire and Dim would propose we deprecate this prop. Do not use, please!
   /// </summary>
+  [Obsolete(
+    "Note: Claire and Dim would propose we deprecate this prop. Do not use, please! Let's have a discussion about subclassing for your needs if nothing exists already."
+  )]
   public string collectionType { get; set; }
 
   /// <summary>
diff --git a/src/Speckle.Core/Models/Layer.cs b/src/Speckle.Core/Models/Layer.cs
new file mode 100644
index 00000000..88ebf9e8
--- /dev/null
+++ b/src/Speckle.Core/Models/Layer.cs
@@ -0,0 +1,9 @@
+namespace Speckle.Core.Models;
+
+/// <summary>
+/// A specialized collection that represents a CAD-app layer. We expect this to grow in the future with possibly other shared props.
+/// </summary>
+public class Layer : Collection
+{
+  public int Color { get; set; }
+}