The modern wing, which serves as the main section of City Hall, was designed by
Raymond Moriyama and built in 1990 as the headquarters of the former
Regional Municipality of Ottawa-Carleton. It is located between the
Cartier Square Drill Hall and the
Ottawa Court House. This section of City Hall contains the Council chamber (known as
Andrew Haydon Hall), a large atrium and a number of offices and public services. The front of the building is marked by a large open plaza that faces
Confederation Park across Laurier Avenue. The plaza is home to concerts, festivals, and other community events. The grounds have a number of features, including a
sound sculpture,
fountain and artificial ice-skating pad. The site had originally been the parade ground for the Drill Hall. During the
Second World War, a complex of structures was erected to house military staff. These buildings were meant to be temporary, but they remained in place for several decades. They were eventually demolished and the City Hall and courthouse were built on the site. The Regional Headquarters building was chosen as the new City Hall upon the amalgamation of the Region and its constituent municipalities in 2001, largely due to its central location. The architecturally acclaimed
John G. Diefenbaker Building, located to the east of downtown, was subsequently sold to the federal government. ==Heritage Building==