[11] A sloboda (a settlement for people relieved from paying taxes) appeared on the site of modern Kalyazin in the 12th century.

[13] Uyezds were abolished as well, and Kalyazinsky District, with the administrative center in Kalyazin, was established within Kimry Okrug of Moscow Oblast.

[15] On November 19, 2001, a chartered IRS Aero Ilyushin Il-18 airplane crashed in Kalyazin, killing all twenty-seven on board.

[6] Two factories in Kalyazin—one producing oil extraction equipment and another one manufacturing some parts of MiG airplanes—are responsible for 42% of the total industrial production of the district.

[19] Kalyazin is connected by train to Moscow (Savyolovsky railway station), Kashin, Uglich, Rybinsk, Sonkovo, Savyolovo.

The town landmark is the Kalyazin Bell Tower, submerged by the Uglich Reservoir and located only partially above the water level.

Other federal monuments include the ensemble of administrative buildings and living houses in the center of the town, and the Ascension and the Epiphany Churches.