Menander was perhaps the greatest of all the Indo-Greek kings. His reign saw the Indo-Greek Kingdom reaches it’s greatest territorial extent, from the Northwest southward to Rajasthan and as far east down the Ganges River Valley as Pataliputra (Patna). His capital was at Sagala. He was also an important patron of Buddhism. His philosophical conversations with the Buddhist sage Nagasena are recorded in the important Buddhist work, the Milinda Panha ("The Questions of King Milinda"; panha meaning "question" in Pali).