After the opening of a new City and County Courthouse on Great George's Street in 1835 the site of the old County Courthouse/ King's Castle was developed as a department store owned by a man named William Fitzgibbon. It is around this time that the site became known as the Queen's Old Castle, perhaps in honor of Queen Victoria, and the older name King's Castle came to be forgotten until modern historians drew attention to the fact that the original Queen's Castle was to the north of the department store.
From the 1840s to the 1970s. The Queen's Old Castle was one of the most popular department stores in Cork. The ownership of the store changed over the years. Brown Thomas Ltd. and Primark, trading under the name Penneys, were among the last owners of the premises while it was still a department store. Power Securities bought the store in 1978 and converted it into a shopping center consisting of 37 individual shops and restaurants.
Interior view of the Queen's Old Castle department store in 1866
by Mark Matlach