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Small museum of the area and its turmoils, in a courtyard with a mosque and cafe.
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There are two, fittingly since a taxiarchis or ταξιάρχης is a brigadier - it's still used as a Greek military rank but here denotes the two archangels Michael and Gabriel. This church is the one built on the mainland in 1844. It was disused after its Orthodox congregation were deported and had a spell as a tobacco and alcohol warehouse but in 2013 was restored as a museum. The other is on Cunda / Alibey island, see below.
Rahmi M Koç Museum
This is the other "archangel church", built in 1873. It's now an automobile museum.