A group of young mechanics and foremen of the Royal Mint and Government Dockyard established a museum and library for mechanical models and architectural design, in 1847, which led to the creation of the Sassoon Library. In 1863, Sir David Sassoon, a leading banker of Mumbai, contributed Rs.60,000/- to the government to build a Mechanic's Institute, now called the David Sassoon Library. This Venetian Gothic styled structure, completed in 1870, forms part of an important ensemble of buildings, that are crucial for the image of the Fort Area.

The library today still boasts of growing membership. It houses a large collection of very rare old books. The reading room is frequented often by working students due to its convenient location in the heart of the business district. In 1996, on the occasion of its 150 Anniversary, an extensive fund-raising exercise was undertaken for the first major restoration efforts carried out to the Library. The Restoration process dealt largely with undoing the damages caused to the building with all the additions urgent restoration tasks were attended to. However, it was found that after eight years many of the unattended areas needed urgent attention. Hence, rather than the earlier fragmented approach, there is a need to collect a sufficient corpus for restoration and work towards a comprehensive restoration program for the Library. It would ensure that all the restoration tasks are attended to and carried out under strict supervision of the consultants within a structured time frame.

One of the oldest libraries in the city. The institute is rendering dedicated services in the field of academic, cultural and social development to the people of Mumbai.

A unique and most enchanting feature of the library is a very well maintained garden in its backyard. It is a 'green lung' amidst the vibrant and crowded commercial area. Stepping into it takes into a world which is at once far removed from the mundane hubbub of the metropolis. Here one can enjoy the works of great authors, indulge in philosophical musings or simply sit back with eyes closed music, relaxing one's strained nerves. This garden which offers solace to its visitors in steer and strain, is another valuable asset of the library.