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Major exhibitions planned for this autumn, and not to be missed, include Sir William Chambers: Architect to George III, from 10 October at the Courtauld Gallery, Somerset House (the great civic palazzo designed by Chambers from 1776, and, in fact, London's first purpose-built office block). The show has been curated by John Harris and Michael Snodin, and promises to be highly polished.

The Walker Art Gallery, Liverpool, is showing the life and work of Sir Charles Reilly (1874-1948), architect, teacher, polemicist and one of the great forces for the good in 20th-century British architecture. The exhibition begins on 25 October, the same day that visitors to Liverpool will be able to see the Great Model of the tantalising domed cathedral that Sir Edwin Lutyens designed, but never built. The vast and inspiring model is itself the subject of a National Lottery bid for restoration.

The Tate Gallery's Grand Tour: The Lure of Italy in the 18th Century begins on 9 October: rediscover the buildings that English "milordi" rushed back to ape on their damp and dismal estates in England.