I know there are many different styles of tubs out there. New ones have opening “doors” to help those who need it to get in and out of their tub. But in the last 5 years I’ve never run across this one before.
It’s a “sunken” tub and anyone will be able to see it as they walk through the home. But this is one of those DLR’s. (My term from Doesn’t Look Right). This is a grand house that was built in 1963.