Mohasthangarh is one of the main attractions in north Bengal. It was the capital of Kingdom of the Mourjo, the Gupta and the Sen Dynasty.

This is the ancient archeological and historical which was, established in 2500 BC. It is the oldest archaeological site of Bangladesh is on the western bank of river Karatoa 18 km. north of Bogra town beside Bogra-Rangpur Road.

The spectacular site is an imposing landmark in the area having a fortified, oblong enclosure measuring 5000 ft. by 4500 ft. with an average height of 15 ft. from the surrounding paddy fields. Beyond the fortified area, other ancient ruins fan out within a semicircle of about five miles radius. Several isolated mounds, the local names of which are Govinda Bhita Temple, Khodai Pathar Mound, Mankalir Kunda, Parasuramer Bedi, Jiyat Kunda etc. surround the fortified city.

This 3rd century archaeological site is still held to be of great sanctity by the Hindus. Every year (mid-April) and once in every 12 years (December) thousands of Hindu devotees join the bathing ceremony on the bank of river Karatoa.

A visit to Mahasthangarh site museum will open up for you wide variety of antiquities, ranging from terracotta objects to gold ornaments and coins recovered from the site. Now it is one of the major tourist spots maintained by Bangladesh archeological Department.

You can go to Mohasthanagar from Bogra town, 10 km. away. Don’t forget to visit Mohasthangar museum while visiting Mohasthangar. Mohasthan Buddhist Stambho is another attraction for the tourists; it is locally called as Behula’s Basar.

In the year 1808 CE (Common Era as against AD), Buchanon Hamilton, for the first time disclosed the details of the ruins of Pundurunagar. Later, scholars like Donnell, Cunningham, Beveridge threw more lights on this ancient city. Sir Cunningham is credited with identifying Mahastahan, the great Muslim city during the glorious Muslim rule of Bangladesh including about two hundred years of unbroken and completely independent Bangladesh, with the ancient city of Pundurunagar.

A sense of the glory of the ancient independent Muslim sultanate of Bangladesh can be found in the words of Ira M. Lapidus in his book: A History of Islamic Societies, Cambridge, where he cited the fact that independent Muslim kingdom existed in Bengal between 1346 CE and 1576 CE and mentioned that "Muslim scholars, scribes, Sufis, poets and intellectuals flocked to India (from other parts of the world). He wrote further: "In Bengal, Sufi writers and Muslim rulers adopted the local languages. The Hindu classic, Mahabharata, and Arabic and Persian classics, including stories from the Arabian Nights, were translated into Bengali at the order of Muslim rulers. Muslim poets also wrote in Bengali about Hindu deities and myths, using Arabic and Persian loan words. This synthesis of languages and literature was the basis for the emergence of a new literary Bengali language."

Several ancient inscriptions belonging to the Maurya, Gupta, Pal and Sen dynasties reveal the existence of the Pundurus in the Pundurunagar. Unfortunately nothing much is known about them these days. Before the arrival of the Aryans, the Pundurus were the natives of this area. The Barendra region of North Bengal (Bogra, Rangpur, Dinajpur, Rajshahi and Maldah) was the original home of the Pundurus.

Inscriptions discovered in 1931 in Mahasthan reveal that there was a massive famine in Pundurunagar, when the government gave a decree ordering food stuff to be distributed amongst the affected subjects which was to be returned during good times indicating that Pundurunagar was an affluent and humanitarian society. After the Gupta dynasty, king Shashanka formed the powerful Gaur kingdom. After the death of Shashanka, the famous Chinese traveler Wan Chuang came to Pundurunagar in the year 639 CE, when besides seeing different Buddhist institutions, he saw a huge Bihar or Shangharam Bhashu Bihar and a memorial built by Asoka over the body of Buddha. According to him Pundurunagar was an affluent city and its perimeter was six miles. The civilization of Pundurunagar ranks side by side with those of Athens, Babylon, Egypt and that of the Assyrians.

Pundurunagar became Mahasthan during the glorious days of the Muslim Sultanate of Bangladesh. A special attraction of Mahasthan is the Mazhar on top of the Garh. Everyday thousands of men and women come from distant places to visit the Mazhar. Many people do “manat” which is going on for ages, there seems to be no exception and no stop. It appears to be like a place of major pilgrimage for both Muslims and Hindus.

Some historians and the local people are of the opinion that this Mazhar is the Mazhar of Shah Balkhi Mahisawar. Apparently, there are two Mazhars related to Balkhi Mahisawar, one being in Mahasthan and the other being in Sultanganj of Godagari Thana.

In the year 1680 CE, emperor Aurangazeb appointed Zamindars of Bihar named Syed Reza, Syed Tahir and Syed Abdur Rahman (three brothers) as care takers of the Mazhars and Mausoleums of Mahasthan Garh and awarded some lands for that purpose. This award letter, written in Persian and inscribed on Bronze is still available with Shibganj resident Mashqurul Alam Chowdhury. In this "Farman" or "Sanad" emperor Aurangazeb referred to this place as "Astana" of Sultan Mahmud Mahisawar and not as a Mazhar. This makes some historians believe that this is not his mazhar but was his astana.

On the Southern gate entrance wall to the so called Mazhar is engraved in Bangla: "Narshingh Roy Dashoshho" meaning "Subject". Now the question is who is this "Narshingh" and who is he subject of? Half mile North West of the Garh lies the houses, locally known as the palace of Porshuram.