Kolainiai is a village in Kelmė District Municipality, Lithuania. It is located about 5 kilometres (3.1 mi) southwest from Užventis. According to the 2011 census, it had population of 261. In 1750, local noble Adamkavičius bequeathed his manor and land with serfs to the Carmelites. He also built a monastery and a church for the monks. In 1797, the monks took over the administration of the Kražiai College, a former Jesuit school. After Tsarist authorities secularized the college in 1817, the Carmelites established their own school in Kolainiai. The school was closed in 1835 after the November Uprising. The monastery itself was closed after the January Uprising of 1863. Russian settlers from Blagoveshchensk (Amur Oblast) were moved into the monastery; the town became known as Blagoveshchensk