[4] Twelver communities reside in the northeastern Sylhet Division in places such as Kulaura and Rajtila, and have ties with the Prithimpassa family.

[citation needed] During the Sultanate era, a Shia nobleman named Sakhi Salamat settled in the village of Prithimpassa in Kulaura in 1499.

[citation needed] The oldest Shia imambara in the country was the Bibi Ka Rauza in Farashganj, Dhaka, constructed in 1608 by Amir Khan.

The next governor of Mughal Bengal, Mir Jumla II also belonged to Shia faith Mir Sayyid Shakrullah al-Husayni of Najaf was one of the Shia noblemen brought by Shuja, and he was the ancestor of Nawab Sayyid Chottan Saheb, who had a large estate in Abul Hasnat Road in Dhaka.

[9] Murshid Quli Khan was originally born into a poor Deccani Hindu family, before being sold into slavery and bought by Haji Shafi, a Persian merchant from Isfahan who had converted him to Shia Islam.

[12] In 1799, Agha Muhammad Reza, a Mughal Shia nobleman in Sylhet of Iranian origin rebelled against the East India Company.

Gaining support from thousands of peasants after claiming to be a Sufi saint, Reza successfully invaded the nearby Kachari Kingdom.

In the 19th century, descendants of the Shia zamindar family of Sitalpur in Purnia, Bihar migrated to the village of Sindurna in Thakurgaon in modern-day Bangladesh.

Shaykh Muhammad Raj of this family built the Shalbari Mosque for the Shia community in the village in 1888, and the site remains a popular tourist attraction.