One One One Eagle Street is a 194.7-metre (639 ft) office building at 111 Eagle Street, Brisbane, Queensland, Australia, located in the city centre. With 6 star Green Star office design rating, the building is part of the CBD's 'Golden Triangle' district. Its location is the site of the old Indigo House building, which was demolished over a period of six months starting in 2008. 95% of all waste from the old building is to be recycled or reused.

Brisbane City is the central suburb and central business district of Brisbane, the state capital of Queensland, Australia. It is colloquially referred to as the "Brisbane CBD" or "the city". It is located on a point on the northern bank of the Brisbane River, historically known as Meanjin, Mianjin or Meeanjin in the local Aboriginal Australian dialect. The triangular shaped area is bounded by the median of the Brisbane River to the east, south and west. The point, known at its tip as Gardens Point, slopes upward to the north-west where the city is bounded by parkland and the inner city suburb of Spring Hill to the north. The CBD is bounded to the north-east by the suburb of Fortitude Valley. To the west the CBD is bounded by Petrie Terrace, which in 2010 was reinstated as a suburb.