The PSB's collection of paintings found its way to the Bhai Mati Das Museum through the efforts of Baba Harbans Singh Kar Seva Dilli Wale (1920–2011). He was a much-respected Sikh who organised kar seva (voluntary service) for the construction of gurdwaras, including the historic gurdwaras in Delhi, Darbar Sahib at Amritsar, Gurdwara Tarn Taran and Gurdwara Paonta Sahib, among others (Khatri n.d.). It appears that it was on his initiative that the building of Majestic cinema at Chandni Chowk was purchased by the DSGMC and replaced by a museum. The bank donated its paintings for the purposes of display, and the Bhai Mati Das Museum opened in 2001. There is little information available on the process of selection of paintings, curation of the display and the people involved. Initially, artist Amolak Singh (1950–2006) was in charge of the museum, but at present there is no artist or curator associated with it. The sevadars of the gurdwara act as caretakers of the museum, and their role is limited to opening, cleaning and closing it.

Bhai Mati Das Museum has 169 history paintings, each provided with a description in three languages, English, Hindi and Punjabi. Here, Sikh history is presented in chronological order, beginning with Guru Nanak (in the fifteenth century), covering the ten Gurus, the events of the eighteenth century that saw conflict with the Mughals and Afghans and subsequently the emergence of Sikh misls and Ranjit Singh's kingdom in the first quarter of the nineteenth century. Beyond this, the story is patchy, with a few canvases on the bhagats, whose verses are included in the Guru Granth Sahib, the Sikhs’ struggle against the British and their contribution to the army of free India.