[2023] Eco 10.0 How to Culture

Pictures and some bathroom objects in the settlement foundation property or a cultural property at the border, yes.

You can find all objects classified for bathrooms in the Ecopedia. Bathtub, Sink and Toilet are some of them.

It shows in the cultural room bonuses.

Correct. It's for "public restrooms" and needs to follow the bathroom category, as for housing.