Complex sentence: Four other workhouses existed: 1738--1956 Holy Trinity on Fore Hill for 80 inmates; built in 1837 the Ely Union workhouse housed up to 300 inmates becoming Tower Hospital in 1948 and is now a residential building, Tower Court.
Split into simpler sentences: Four other workhouses existed, including Holy Trinity on Fore Hill for 80 inmates (1738-1956) and the Ely Union workhouse, built in 1837, which housed up to 300 inmates. The latter became Tower Hospital in 1948 and is now a residential building, Tower Court.