butkara stupa in mingora swat, pakistan built in the 2nd century bce

archaeological architecture civilization pakhtunkhwa historical archeology religious discovery monastery pakistan buddhist buddhism heritage gandhara malakand uddiyana landmark historic butkara mingora century mauryan emperor history culture ancient buddist antique ashoka buddha temple valley khyber stupa built asoka stone rocks great swat site dome ruin asia kara 2nd bce old art