It's a bit of a schlep to get there but the restored Chora Church in the old city walls offers a stunning glimpse of late Byzantine splendour, its walls and ceilings adorned with glittering mosaics and breath-taking frescoes. Like Aya Sofya, it has made the journey from Byzantine church to Ottoman mosque and then to modern museum, and now stands in a neighbourhood of restored Ottoman wooden houses, prettily painted in pastel colours. Before you go back to your hotel, take a look at the nearby walls that ringed old Constantinople and date back to the fifth century.