4 Best Sights in Iznik, The Sea of Marmara and the North Aegean

The primitive mosaic floor is believed to date from the church's construction in the 6th century, during the reign of Justinian. The church was later reconstructed in the 11th century, after an earthquake toppled the original edifice. A faded fresco of Jesus, Mary, and John the Baptist at ground level on the north wall and some rather poorly preserved frescoes in the domes on either side of the apse date from the Byzantine era. In a controversial move, authorities converted this former museum into a mosque in 2011. Try to arrange your visit outside of prayer times, when you can explore the site freely and take photographs.

The eastern gate to the ancient city was built in honor of a visit by the Roman emperor Hadrian in AD 120 and is among the best-preserved remnants of the thick, sturdy fortifications that once encircled İznik. Some of the original inscriptions, marble reliefs, and friezes remain intact. Outside the gray stone and faded brick gate is a leafy graveyard and the city's small but technically impressive aqueduct.

Founded in the 1990s to revive the art of tile-making, this establishment fashions large orders, often for overseas delivery. Even if you are not commissioning a job, you can see the beautiful craftsmanship, watch artisans producing tiles, and wander in the lavender-fresh gardens. An appointment is necessary to access the grounds.

If you're looking for a good spot to watch the sun set over İznik Lake, the tomb of Abdülvahap Sultan Sancaktarı, a hero of the battle in which the Ottomans captured the city in 1331, is well worth the trip for its sweeping view. On a clear evening the orange glow of sunset makes the surrounding mountains look like the backs of gigantic serpents sleeping in the lake. The monument—a short drive or a 30-minute walk (some of it uphill) from the city center—attracts couples young and old as well as extended families, many of whom bring dinner along to accentuate the experience. Take Kılıçaslan Caddesi east through Lefke Gate and then follow the ruins of the Roman aqueduct along the road on your right until you can see the large Turkish flag on the hilltop near the tomb.