The whole complex has been referred to as the world's biggest display of stolen property. Among the plundered Byzantine silver and gold is the Pala d'Oro, a jewel-encrusted altarpiece covered with over 3,000 precious stones. The Tetrarchy, a porphyry statue of three emperors on the south side of the building, was taken from Constantinople in 1204 and presented to San Marco. The foot missing from one of the emperors was discovered recently in Istanbul - but is being kept there. Visit early to avoid the crowds and follow the signs to Loggia dei Cavalli. From here, even if you don't visit the horses and loggia, you can look down into the basilica and get a clear idea of its shape.