One day
Start at Piazza Sordello and the vast Palazzo Ducale, booking the Camera degli Sposi for Mantegna's frescoed room. Walk to Piazza delle Erbe for the market, the Rotonda and Alberti's Basilica di Sant'Andrea, and have a tortelli-di-zucca lunch. In the afternoon, cross to the Palazzo Te for the Room of the Giants, then walk or cycle the lakeshore at sunset for the skyline mirrored on the water.