Zeidler Partnership Architects is an international architecture, urban planning, and interior design firm based in Toronto, Ontario, Canada.
Zeidler Partnership has offices in Calgary and Victoria (Canada); Beijing, Shanghai and Chengdu (China); Abu Dhabi (UAE); Berlin (Germany); and London (UK). The firm is part of a legacy that is the longest continually operating architectural firm in Ontario. The firm began in 1880 in the City of Peterborough when William Blackwell established his practice there. Eberhard Zeidler joined Blackwell Jr. and partner Craig in 1951. The firm (renamed Craig, Zeidler and Strong) moved to Toronto in 1963. Senior partner emeritus, Eberhard Zeidler, continues to provide support and advice to the firm, which is now led by senior partner Vaidila Banelis, and four partners.
The firm is engaged in the discourse about Ontario's architecture. In addition to architecture, the firm's work includes interior design and master planning. The firm’s main body of work is located in Canada and the United States, with some projects in Europe, the Middle East and Asia.