Patna Sahib Gurdwara in Patna marks the birthplace of Guru Gobind Singh, the tenth and final Guru of Sikhism. It is one of the most important Sikh pilgrimage sites.

According to the 2011 Census, Bihar's population was approximately 10.3 crores (103 million), making it one of the most populous states in India.

Bakhtiyar Khilji, an Islamic general, attacked Nalanda University around 1193 CE and destroyed much of its library and infrastructure, leading to its decline.

The Kosi River, originating in Nepal, is notorious for its unpredictable behavior and frequent floods, causing immense damage to Bihar. It has been called the 'Sorrow of Bihar' due to its devastating and recurring flood patterns.

Calculation: 322 - 298 = 24 years. Chandragupta Maurya founded the Mauryan Empire and established his capital at Pataliputra (modern Patna), Bihar.

While the Darbhanga Raj Palace was primarily developed by the Darbhanga Rajas during British rule, Shah Jahan's administration oversaw significant construction in Bihar. The palace is one of Bihar's most significant architectural structures.

The Bodhi Tree is located in Bodh Gaya, Bihar, where Buddha meditated and achieved enlightenment. The Mahabodhi Temple stands nearby and is a UNESCO World Heritage Site.

Nalanda University, located in Bihar, was one of the world's oldest universities and the most prestigious center of Buddhist learning from the 5th to 12th century CE. It attracted scholars from China, Japan, Korea, and Southeast Asia.

Bihar shares the India-Nepal border in its northern region. West Champaran and East Champaran districts have significant sections of the Bihar-Nepal international boundary.

Rajgir (Rajagriha) is mentioned frequently in Buddhist texts as a place where Buddha spent considerable time. It was the capital of the Magadha empire under King Ajatashatru.