"It was through talks with the Golden Horde that Alexander Nevsky prevented a Mongol raid on Novgorod."

"The city also traded with the Golden Horde,"

from the mid-13th century onwards the city fell victim to nomadic raids and was seized by the Golden Horde (AB ev)

"In 1262 a rebellion erupted in Suzdal, killing Mongol darughachis and tax-collectors. Only after Alexander Nevsky begged Berke not to punish the Russian people and the Vladimir-Suzdal cities agreed to send large sum of payments, the Golden Horde aborted its punitive expedition."

"defined the territory ..as extending ? in breadth from Bulghar to the Iron Gate [Temür-Qahalqa or Derbent]."

"In 1321, the town was annexed to the Golden Horde"

Conquered in 1241

"Built on an ancient site, the Kazan Kremlin dates from the Muslim period of the Golden Horde and the Kazan Khanate."

became a centre of a separate province (or duchy) within the Golden Horde. During the period of Mongol domination Bolgar acquired immense wealth, many imposing buildings, and grew tenfold in size (wiki)