Archaeology in Central Asia was active following its conquest by the Russian Empire, but remains a relatively understudied area. There has been some field work done in the city both before and during the rise of the Soviet Union, and there is likewise renewed interest in the city as one of the oldest cities of the independent country of Kazakhstan. Notable among the archaeological discoveries is evidence of an early plumbing system like the kinds found in Samarqand and other cities of the early Persian empires.