The castle was originally built on an island, later connected to the mainland through land reclamation and the lowering of the lake's water level.
Archaeological findings suggest the site was occupied by wooden structures before the stone fortifications were erected in the 1500s.
The defensive towers were never fully completed in their original intended military form, serving more as status symbols and residential spaces.
The castle's basement levels retain vaulted ceilings that represent 16th-century fortification architecture.
For a significant portion of the 20th century, the castle functioned as a school and later as residential housing for local agricultural workers.
Siesikai Castle is a rare surviving example of a Renaissance-style fortified manor house in Lithuania, dating back to the early 16th century. Originally built as a defensive residence by the Daumantas-Siesickis family, the structure features a quadrilateral layout with four corner towers. The castle is situated on the northern shore of Siesikai Lake, integrated into a parkland setting. Over the centuries, the building has undergone various architectural modifications, including transition into Baroque and Neoclassical styles. It was famously neglected during the Soviet period but has been undergoing gradual restoration efforts since the late 20th century. Today, the site serves as a museum department of the Ukmergė Regional Museum. The interior retains fragments of historical polychrome wall paintings and original masonry elements.
The lakeside vantage point facing the southern facade provides the best view of the building's reflection in the water.
Wear comfortable, flat walking shoes as the surrounding terrain can be uneven or muddy.
Bring mosquito repellent if visiting during the summer months due to the proximity to the lake.
Contact the Ukmergė Regional Museum in advance to confirm if guided access to specific interior rooms is available on your chosen date.
Do not attempt to enter areas marked as under restoration or restricted for safety reasons.
Visits are strictly by appointment or scheduled guided tours; contact the Ukmergė Regional Museum to confirm availability before traveling.
Respect all ongoing restoration signage; stay within designated paths to protect the historical grounds.
