This Christopher Wren-designed beauty is still the home of GMT. The world-famous museum also invites couples to celebrate their nuptials in a range of impressive event spaces. The historic Octagon Room is our favourite among them and can be hired for a reception or dinner. Elsewhere, The Planetarium shows off the venue’s more modern side, while The Foyer works well for larger dining events. The best views are from the Meridian Courtyard.