Rialto Towers

Rialto Complex
Rialto as viewed from the base of the towers, in May 2017
Record height
Tallest in Melbourne from 1986 to 1991[I]
Preceded by	Sofitel Hotel at Collins Place
Surpassed by	101 Collins Street
General information
Type	Office
Location	Melbourne, Australia
Coordinates	37°49′08″S 144°57′30″E / 37.81889°S 144.95833°E / -37.81889; 144.95833
Construction started	1982
Completed	October 1986
Cost	$220 Million AUD
Height
Architectural	251 m (823 ft)[1]
Roof	247 m (810 ft)[1]
Observatory	234 m (768 ft)[1]
Technical details
Floor count	55 (plus 3 underground)
Floor area	84,000 m2 (904,200 sq ft)
Design and construction
Architect(s)	Gerard de Preu and Partners Perrott Lyon Mathieson William Pitt (1891) Charles Debro (1890) Richard Speight (1890)
Structural engineer	W. K. Meinhardt & Partners (for Tower) Bonnaci Winward (for Hotel)
Services engineer	Lincolne Scott Australia C. R. Knight and Associates.
Other designers	Dino Burranti Richard Falkinger Meldrum Burrows & Partners Davenport Campbell & Partners
Main contractor	Grollo Australia
Renovating team
Architect(s)	Woods Bagot (2010-2017)
Other information
Parking	500

Rialto (often The Rialto, or Rialto Towers) is a skyscraper located at 525 Collins Street, in the western side of the Melbourne central business district, Victoria, Australia. It was the tallest office building in the Southern Hemisphere when it was constructed.

The Rialto featured Melbourne's first skyscraper public observation deck, which operated between 1994 and 31 December 2009.^[2] It was also the location of Melbourne's first Tower running event.