The two major ancient civilizations of Pakistan, were the Indus Valley Civilization (Harappa in 7 BC and Moenjodaro 4 BC) and the Gandhara Civilization (500 BC to 10 AD).
Gandhara is the region that now comprises of Peshawar valley, Mardan, Swat, Dir, Malakand, and Bajaur agencies in the North West Frontier Province (NWFP), Taxila in the Punjab, and up to Jalalabad in Afghanistan. It is in this region that the Gandhara civilization emerged and became the cradle of Buddhism. It was from here that Buddhism spread towards east as far away as Japan and Korea.
The intriguing record of Gandhara civilization, discovered in the 20th century, are found in the archeological sites spread over Taxila, Swat and other parts of NWFP. The rock carving and the petroglyphs along the ancient Silk Road (Karakoram Highway) also provide fascinating record of the history of Gandhara.
Taxila is the abode of many splendid Buddhist establishments. Taxila, the main centre of Gandhara, is over 3,000 years old. Taxila had attracted Alexander the great from Macedonia in 326 BC, with whom the influence of Greek culture came to this part of the world. Taxila later came under the Mauryan dynasty and reached a remarkable matured level of development under the great Ashoka. During the year 2 BC, Buddhism was adopted as the state religion, which flourished and prevailed for over 1,000 years, until the year 10 AD.
During this time Taxila, Swat and Charsadda (old Pushkalavati) became three important centers for culture, trade and learning. Hundreds of monasteries and stupas were built together with Greek and Kushan towns such as Sirkap and Sirsukh, both in Taxila.