Hats and architecture may not appear to have anything in common—at first blush, anyway—but architect-turned-milliner Gabriela Ligenza begs to differ. For the London Festival of Architecture, Ligenza and design duo You&Me commissioned several local architects, artists, and designers to produce hats inspired by their visions of London. Check out the “hat-itectural” pieces that Inhabitat favorites like Austin + Mergold came up with, including a Magritte-esque bowler hat made from recycled cardboard.