The Church of the Three Hierarchs (Trei Ierarhi) is one of the most remarkable buildings in Romania. Built between 1637 and 1639, it stands out immediately for its facade: every centimetre of the exterior stonework is covered in carved geometric and floral patterns, creating an effect unlike anything else in Orthodox church architecture. The carving is extraordinarily fine and was executed by craftsmen brought from across the Orthodox world.
The interior is more restrained but contains the tomb of Prince Vasile Lupu, who commissioned the church, and the remains of Prince Dimitrie Cantemir, one of Romania's most important Enlightenment figures. The monastery complex has been heavily restored over the centuries — it was badly damaged in multiple fires and earthquakes — but the exterior stonework has survived remarkably well. The monastery is still an active religious community; dress accordingly when visiting. It is located a short walk south of the central boulevard.