Old Tbilisi is principally centered on what is commonly referred to as the Tbilisi Historic District. It is important due to its significant architectural and urban value. It chiefly represents a 19th-century urban fabric with largely eclectic architecture which includes the buildings and structures from the 5th to the 20th century. The district houses a bulk of the tourist attractions in Tbilisi, including churches, museums, sulphur bathhouses, and peculiar wooden houses with open, carved balconies. In the 19th century, the core territory of the modern-day district of Old Tbilisi was tentatively subdivided into ethnic neighborhoods such as Avlabari with its Armenian and Georgian quarters, Alexanderdorf German quarter on the left bank of the Mtkvari River and the Persian Quarter (Said-Abad) on the right bank of the Mtkvari River.