High Quality Content by WIKIPEDIA articles! Wallis House is a prominent Ottawa, Canada landmark located at the corner of Rideau Street and Charlotte Street. It was built to house the Carleton County Protestant General Hospital. This was the second hospital in the city, after the Catholic hospital run by the Grey Nuns. The hospital`s first building was completed in 1851, but had become too small and Wallis House was built to replace it between 1873 and 1876. It was paid for and supported by the various Protestant churches in the area. The east wing was added to the hospital between 1887 and 1898. It remained a hospital until 1924, when it was merged with two others to create the Ottawa Civic Hospital.