No rules, no item limits. If you want to display your museum, then take the time to do it yourself. Simply post where your house is and pictures of your museum. 1) Recommended to post a a screenshot of the map with your house as it makes it easier to find it. 2) Don't forget to indicate the name of the shard! I will remove any posts made without images and/or not displaying a museum for easier navigation. So, don't make "Wow, that is a great museum" type of posts.