Rowan Moore’s best architecture of 2021

From affordable housing to an Oxford quad, beauty and practicality cut through debates over cladding, billionaires – and a moundRead the Observer critics’ review of 2021 in full hereWhat can be said of a world where one billionaire wants to build a giant tulip-shaped tower of little practical use and another wants to house thousands of students in windowless rooms in a block with all the charm of an Amazon distribution centre? The first, designed by Foster + Partners for the Brazilia