St Catharine’s College, Cambridge, often informally shortened in speech or writing to “at Catharine’s, Cambridge” or “at Catz, Cambridge.”

St Catharine’s is a constituent college of the University of Cambridge, founded in 1473 as Katharine Hall and renamed in the 19th century.

It sits on Trumpington Street in the historic city centre, immediately south of King’s and opposite Corpus Christi, with a distinctive open-sided Main Court and red-brick frontage.

The college is named after Saint Catherine of Alexandria, whose emblem, the Catherine wheel, appears on its arms. The wheel with spikes on was the method of execution of Catherine but it shattered when she touched it.
 
Interesting facts....
The attic rooms known as Sky Hall are associated with one of Cambridge’s best-known ghost stories: students repeatedly reported an elderly man sitting silently by the fire, sometimes pointing toward the flames. The figure is often said to be the spirit of a former resident who died of exposure, and one nervous scholar allegedly kept a pistol under his pillow while sleeping in the room.