KarlÃÂn () is a cadastral area of Prague, part of Prague 8 municipal district, formerly an independent town (which became part of Prague in 1922). It is bordered by the river Vltava and Holeà ¡ovice to the north, VÃÂtkov hill and à ½ià ¾kov to the south, New Town to the west and Libeà  to the east.
The building of the KarlÃÂn district began in 1817, surrounding the Rosarium of the Knights of the Cross with the Red Star. The new settlement was named after the fourth wife of Emperor Francis I of Austria, Caroline Augusta of Bavaria.
After the demolition of the city walls, the properties in KarlÃÂn were counted among the cheapest properties of Prague. 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 KarlÃÂn was incorporated into Prague. At this time, the electrical engineering pioneer and industrialist Frantià ¡ek Kà Âià ¾ÃÂk had great influence in the area. He established a streetcar line, which he then sold to the city.
In the 1970s, traffic was rerouted onto the Rohanské nábà Âeà ¾Ã and the main arterial road was relieved. Since 1990 KarlÃÂn is connected to the Prague Metro by Kà Âià ¾ÃÂková station named after Kà Âià ¾ÃÂk, and a pedestrian zone has been established as well. In 2002 KarlÃÂn was severely affected by the 100-year flood. It has since recovered and is becoming a new destination for businesses and residences.
A notable building in KarlÃÂn is the KarlÃÂn Railway Bridge, which connects the Masaryk Railway Station to the Bubny station. The viaduct (also called KarlÃÂn viaduct) was named after Alois Negrelli, it is long and was put into operation on 1 June 1850. It is the longest bridge/viaduct on Czech territory.
Other notable buildings include: