The name of Hans Falk, as a Moscow Cannon Yard craftsman, was first mentioned in historical documents in 1627.
A German scholar Adam Olearius, who travelled through Russia in the 1630s, mentions Hans Falk in his book Beschreibung der muscowitischen und persischen Reise, saying that he was a very experienced craftsman from Nuremberg and taught Russians how to cast cannons.
[1] In 1641, Mikhail Fyodorovich ordered Hans Falk to cast a 700-pood (11,500 kg) bell for the Dormition Cathedral of the Moscow Kremlin, which would shatter 10 years later.
In 1652, Falk took issuance with some of the Russian bellmakers (led by Danila Matveyev and Yemelyan Danilov) on recasting of this bell and lost the court battle.
A certain succession of Falk's casting traditions can be traced in the works of Yemelyan Danilov, Alexander Grigoryev, and the Motorins.