They have changed it since you last visited. It is now primarily used as a mosque instead of a museum. The old floors have been covered by a carpet and it hosts several prayers a day.
I would encourage anyone looking at porter that needs more flexibility, a deeper feature set, a more extensive cli, and/or flatter pricing structure to check out convox [https://convox.com]. I've been using it for years on top of EKS and have been able to defer hiring a dedicated dev ops person.
https://www.dailysabah.com/turkey/istanbul/istanbuls-reverte...