For that reason, the number of industrial enterprises and dwellings grew very quickly in the area of "Rohan Island" (Rohanský ostrov). On 1 January 1922 Karlín was incorporated into Prague.
The rapid growth of industrial enterprises and dwellings in the "Rohan Island" (Rohanský ostrov) area was a consequence of this event.  On January 1st, 1922, Karlín joined Prague.