[2] A "live" bridge of boats linked the Kremlin with Zamoskvorechye on a nearby site as early as the 15th century.
In 1643, Tsar Mikhail Feodorovich engaged Anie and Jogann Cristler, architects from Strassburg to design a stone bridge.
Its south end terminated with a barbican tower, commonly called Six Gates (two for through traffic, four looking sideways).
[citation needed] The bridge deck originally included wooden storehouses, mills, taverns and tax collector's booths.
[4] The Second Stone Bridge was built in 1859 by colonel Tannenberg on the same site, in line with today's Lenivka Street.
The second contest was won jointly by engineer Nikolai Kalmykov and Schuko-Gelfreikh-Minkus team of architects.