Byzantine Churches of Thessaloniki

Thessaloniki has been continuously Christian for longer than almost any European city, and the evidence is scattered through the modern streets in a way no single site can be. The Rotunda, built as a Roman monument and converted, keeps late antique mosaics of architecture and martyrs on a gold ground. Hagios Demetrios, huge and rebuilt after a fire, has surviving mosaic panels flanking the sanctuary and a crypt over the martyr's shrine. Hosios David hides an apse mosaic of extraordinary quality in a small chapel up in the old town, and Hagia Sophia carries a domed Ascension. A dozen more, from brick Panagia Chalkeon to frescoed Saint Nicholas Orphanos, fill in the centuries between.

What you actually see

• Hagios Demetrios - the city's great basilica with mosaic panels and the crypt below.
• The Rotunda - late antique gold mosaics under a brick dome of Roman scale.
• Hosios David - a small chapel in the Upper Town with a remarkable early apse mosaic.
• Saint Nicholas Orphanos - dense fourteenth-century frescoes in a modest walled churchyard.

When to go

Any season works, since these are interiors and the city is comfortable most of the year. Hours are the real constraint: several of the smaller churches open mornings only and close on set weekdays, so build the day around them and leave the big basilicas, which stay open longer, for the afternoon. Services run frequently and visitors are expected to wait them out quietly.

Honest expectations

Opening hours are inconsistent and posted times are not always kept, so expect at least one locked door per day. Restoration scaffolding moves between the monuments and can block a key mosaic without warning. Interiors are dim, flash is not allowed, and photographs mostly disappoint. Walking between them all means real distance and a stiff climb to the Upper Town.

Nearby

The Roman forum, the Museum of Byzantine Culture and the Upper Town walls are all part of the same walk.