Marble End Tables Can Anyone Tell Me More About An Odd Antique Cabinet?

Can anyone tell me more about an odd antique cabinet? - marble end tables

I've recently bought, a former furniture store into a car. It is made of wood and the size of a final table with marble top. It's on shelves, but the lower plateau is a ceramic basin employs as a hole in it, it seems that there should be some sort of plumbing or something. Each idea may be, which would be used?