Lahore is one of the oldest city in the subcontinent. Till this date we don’t know when it was founded. Some historians says it’s almost 4000 years old but proved evidence suggests that lahore is at least 2000 years old. Hieun tsang famous Chinese pilgrim visited lahore in 700 A.D. and wrote about city in his journals.
Oldest authentic surviving document was an anonymous document written in 982 and translated in 1927 by Vladimir Fedorovich Minorsky. The document is called HUDUD I ALAM which means regions of world. This document described lahore as a shehr or town with. Marvelous temples, huge markets and spacious orchards. This document is now present in British Museum.
Ptolemy, 2nd century famous Egyptian astronomer and geographer mentioned a city between river Indus and patna that might be Lahore.
According to oral legends, In ancient times Lahore is know as Lavpuri means city of Lav in Sanskrit because it was founded by Prince Lav or Loh, the son of Ram, hindu deity, while Kasur was founded by his twin brother Prince Kush. To this day Lahore Fort has a vacant temple dedicated to Lav or Loh, hence Loh-awar or Fort of Lahore. Hence the name Lahore came into existence. courtesy: Dr Owais Karni‘s blog