Iași is the largest city in eastern Romania and the seat of Iași County. Located in the Moldavia region, Iași has traditionally been one of the leading centres of Romanian social, cultural, academic and artistic life. As of 2011, the city proper has a population of 290,422. Summers are warm with temperatures sometimes exceeding 35 °C (95 °F) while winters are cold and windy with moderate snowfall and temperatures at night sometimes dropping below −15 °C (5 °F). Average monthly precipitation ranges from about 25 mm (1.0 in) in October to 100 mm (3.9 in)in June. Iaşi features historical monuments, 500-year-old churches and monasteries, contemporary architecture, many of them listed on the National Register of Historic Monuments. Notable architecture includes the Trei Ierarhi Monastery, part of the tentative list of UNESCO World Heritage Site, or the neo-Gothic Palace of Culture, built on the old ruins of the mediaeval Princely Court of Moldavia.