It is also referred to as Karuvur in the Sangam literature .
Karur is referred to Vanchi and later when the capital was changed to Kodungallur the city was renamed as Vanchi .
Karur is also referred to as Vanchi in the Sangam literature .
Karur is referred to Vanchi and later when the capital was changed to Kodungallur the city was renamed as Vanchi .