At the palace’s heart is Peristil, an imperial square flanked by two colonnades where Emperor Diocletian once addressed the public. Towering above the square is Split’s landmark, the 57-meter-tall belfry; climb up to take in stellar views over the town. The adjoining St. Domnius Cathedral is housed in an octagonal structure which was once the emperor’s mausoleum (which is rather ironic considering he was a persecutor of Christians).