The Bodh Gaya temple was constructed during the Gupta period (5th-6th century CE). It is one of the most important Buddhist pilgrimage sites and represents early Indian brick temple architecture.

Nalanda University was excavated and studied extensively in the 20th century, with major excavations providing insights into its monastic buildings, libraries, and academic structures, confirming its status as a premier educational institution.

The Son River forms a natural boundary between Bihar and Jharkhand states for a considerable stretch. It is a tributary of the Ganges and flows through both states.

While historical records about Samprati are limited, Ashoka himself was instrumental in spreading Buddhism throughout Bihar. The Nalanda region became a major center of Buddhist learning after Ashoka's support.

The Mithila region (North Bihar) experiences severe seasonal flooding primarily due to heavy monsoonal rains and the overflow of rivers like Kosi and Mahananda that originate in the Nepal Himalayas, which receive substantial snowmelt and precipitation.

Pataliputra was the capital of the Mauryan Empire and continued to be significant during the Shunga period. It was one of the largest cities in the ancient world with well-organized administration, walls, and public structures.

Darbhanga is renowned as the 'Land of Poets' due to its rich cultural heritage and contribution to Sanskrit literature and Maithili poetry.

Vikramashila University was founded by King Dharmapala of the Pala Dynasty in the 8th century CE in Bihar.

The Kosi River is called the 'Sorrow of Bihar' because it frequently changes its course and causes devastating floods in North Bihar.

Nalanda University was one of the most important centers of Buddhist learning and attracted scholars from across Asia.