| APA Building | |
|---|---|
 | |
| Location | 53–63 Martin Place, Sydney central business district, New South Wales, Australia |
| Coordinates | 33°52′05″S 151°12′39″E / 33.8680°S 151.2109°E |
| Built | 1936 |
| Architect | David King |
| Official name | APA Building |
| Type | State heritage (built) |
| Designated | 2 April 1999 |
| Reference no. | 682 |
| Type | Commercial Office/Building |
| Category | Commercial |
| Builders | Kell & Rigby |
  Location of APA Building in Sydney | |
The APA Building is a heritage-listed office building located at 53–63 Martin Place in the Sydney central business district, New South Wales, Australia. It was designed by David King and built in 1936 by Kell & Rigby. From 2004 to October 2021, the building most notably housed a Lindt chocolate café on the eastern side of the ground floor. The café came to international attention during the 2014 Sydney hostage crisis, thus being commonly referred to as the Lindt café siege. The building was added to the New South Wales State Heritage Register on 2 April 1999.