It became the Crown's Tribunal in 1578 when king Stefan Batory appointed it to be the ultimate court for the Malopolska region as well as a few other south-eastern regions which are now no longer within Poland's boundaries. When I found this out, I was struck yet again - I had no idea Lublin was so important a few centuries ago!
The legend of the Devil's Claw (see my General Tips) talks exactly about this Tribunal.
Currently the building houses the Town Hall History Museum and the Crown's Tribunal Museum .
Classical music concerts also take place there, and in when I visited Lublin in September, there was an international Young Violinists' Contest going on.

