It is also the site of the ancient kingdom Gandhara, the ruins of its capital, Pushkalavati, (modern day Charsadda), and the most prominent center of learning in the Peshawar Valley, Takht-i-Bahi. It has been under the suzerainty of the Persians, Greeks, Mauryans, Kushans, Shahis, Ghaznavids, Mughals, Sikhs, and British Empire throughout its long history. Khyber Pakhtunkhwa is the third largest province of Pakistan by the size of both population and economy though it is geographically the smallest of four.[3] It comprises 10.5% of Pakistan's economy, and is home to 11.9% of Pakistan's total population, with the majority of the province's inhabitants being Pashtuns, Hazarewal, Chitrali, and Kohistanis.