Does an old-looking hamam have to be historic?
No. Marble, domes and Ottoman-style decoration can also be modern. Look for documented construction and restoration dates if the age of the building matters to you.
Related questions
How can I check whether a hamam's history is accurate?
Look for the building's own documented history, museum records and restoration research. Separate construction dates from later alterations and the current operator's marketing.
What is the difference between restoration and recreation?
Restoration works with an existing historic structure; recreation produces a new interpretation. Ask which elements survive and which were added during later work.
Does UNESCO recognition apply to every Istanbul hamam?
No. Recognition of Istanbul's historic areas is not a blanket endorsement of every bath, operator or treatment. Check the actual listed area and building context.