 Tuskulėnai Manor is Žirmūnai's oldest extant architectural structure.The manor was built in 1825, following a design by Karol Podczaszyński in the neoclassical style.It consists of the principal building (the palace), an "officina" (storage house), and several adjacent buildings, including a small eclectic chapel of St. Theresa located about 100 metres south of the principal building.