The Vouleftikon is the squat, domed building on the east side of Syntagma Square — originally the Agha Pasha Mosque, built in 1730. After Greek independence the new republic borrowed it as a meeting place for the first elected national assembly.
The interior is usually open to visitors and contains a small exhibition on the early days of the Greek state. The architecture is the main interest: the central dome and four flanking half-domes, the slim minaret demolished long ago, the simple stone niche where the mihrab used to be. It is one of the few well-preserved Ottoman buildings in southern Greece.