A gem of an antiques market, just next to the outsize birdbath that is the mausoleum of Augustus. Stalls are heaped together in the colonnades of an old Fascist state building and are conveniently placed for a spot of browsing before or after Sunday brunch at Gusto’ in the same square. Anything from vintage World War I flying hats to turn-of-the- century kaleidoscopes can be picked up for a song, or indeed a dance – the same space is given over to tango dancers on certain days.