MCA Sydney extension, by Sam Marshall

In March 1932, Sydney Harbour got its iconic Harbour Bridge, that steel arch they call the Coathanger. Forty years on the Sydney Opera House debuted and, with it, a defining image of the city. A week after the bridge’s 80th anniversary the harbour’s newest icon, Sydney’s new Museum of Contemporary Art, is completing what has slowly but surely become a pattern.

After a 21-month closure, the museum reopens its original premises – the Art Deco former Maritime Services building – as one half of a fully integrated entity, part serious symmetrical sandstone, and part deconstructed cube, each bracketing the last century. Renovations to the old building include reimagined entrances and a northern flank that opens completely to its sister building for a seamless flow. Yet the new annex is the obvious debutante. Designed by local architect Sam Marshall, it introduces an icon for the city’s post-Opera House generation.

Marshall used a contrasting palette of black, white and brown and a radical configuration of Jenga-like blocks to fight fire with its arresting neighbours. But while his approach may seem incongruous on Circular Quay, fronting Sydney’s oldest district, Marshall has clearly been paying attention. He’s designed the forecourt as a pedestrian ‘street’ to correspond with the network of lanes that see it now as a nucleus. The street spans both entrances, enticing visitors into the foyer, then leading them up through the various levels.

Inside, he treated the galleries like houses in and of themselves, offering views in, out and between them, mirroring the tight community outside. Each block is linked by a glazed wall, which remedies that age-old museum anxiety that surfaces when you’ve lost track of your route. Voids and terraces on every levels makes this museum seem very much a part of the harbour.

The real upshot of all those sightlines? The views are astounding. No gallery is without one. Not even the learning centres are robbed of glorious harbour vistas. A new café and sculpture garden have been placed atop the structure, looking out on the bridge and the Opera House and, 40 years from now, who knows what else?