given to Toompea. That area, located southwest of the hill and where the suburbs (Vorstadt) of Toompea (Tõnismäe, Kassisaba and Kelmiküla) were built during subsequent periods, was called "Dome territory" until the 20th century. Soon after returning to Toompea, the Order started expanding the castle – the whole Castle of the Order () was extended and developed into the strongest centre of its northerly realms, a symbol of their military and political power. New higher outside walls were built, moats were widened and deepened. The first part of the Pikk Hermann ("Tall Hermann") tower, which tops the Toompea castle, was completed by 1371. Pikk Hermann was the first tower in Tallinn adjusted for defence in the era of firearms. Later in the 16th century the tower was rebuilt taller, from the original height of 35 m. The wall of the Great Castle was also fortified with new towers: altogether 14 defence towers (including a gate tower named Clock Tower – the only exit) had been built along its wall by the end of the 14th century. Swedish and Russian rule The Swedish Empire conquered Northern Estonia during the Livonian War, in 1561, and held it until the Great Northern War, when Tallinn was conquered by Russia in 1710. When Tallinn capitulated to Eric XIV of Sweden in 1561, the king decided not to change the status quo in the relations between Toompea and Lower Town. Toompea, as a separate town (Dom zu Reval) under its own administration was able to retain a variety of special rights and privileges, the last of which remained in the books until 1889. Toompea was joined with Tallinn (Lower Town) as late as in 1878, when during the period of Russification the previous laws governing the two towns were replaced with Russian administrative law. The two parts of the town were also united for a brief period in 1785-1796. Toompea and the Lower Town had been united into a single police district in 1805. Particular private law was in force for Toompea until 1944. In 1684 Toompea suffered the most devastating fire of its history. Toompea had been affected by earlier fires in 1288, 1433, 1553 and 1581, but the fire of 1684 was much larger in scale, destroying most of the buildings in the Great Castle, including the cathedral. The Small Castle escaped of the fire intact. The fires are one cause why Toompea