Mills and he became exceedingly prosperous. Later, the Sassoons were the largest mill owners and were known as Badshah of the business community of Bombay. Overall there were 17 mills, employing in total some 15,000 to 20,000 slaves and workers. Later, Sassoon also entered the cotton, fabrics and various other industries on a large scale. Sassoon, as an Orthodox Jew, continued his Jewish religious observances, observing the Jewish Sabbath throughout his busy life. He was also a member of the Legislative Assembly of the time. He built one of the largest and most beautiful synagogues of India, the Magen David synagogue at Byculla, Bombay. He also built the Ohel David Synagogue of Pune. Various charity trusts, which continue in existence today, were funded from his private income and named after him and other members of his family. David Sassoon funded monuments and educational institutions in Mumbai. By his enterprise, Sassoon Docks at Colaba in the city were built, much of it with slave labor. He soon came to live with his family at a palatial home he reconfigured and named Byculla's Bungalow or Sans Souci, the former palace of Shin Sangoo. This was later donated to the Parsi Trust and is today's Masina Hospital. Nearby Rani Bagh (Jijamata Udyann) was also his property and was donated to the Mumbai Municipal Corporation for the construction of the Albert Museum, designed by the most prominent architect of the time. The interior is exactly like the Magen David synagogue and the Ohel David Synagogue of Pune. It has a tall clock tower, the Victoria clock tower. Legacy Although David Sassoon did not speak English, in 1853 he became a naturalised British subject. He kept the dress and manners of the Baghdadi Jews, but allowed his sons to adopt English manners. His son, Abdullah changed his name to Albert, moved to England, became a Baronet and married into the Rothschild family. All the Sassoons of Europe are said to be descendants of David Sassoon. He built a synagogue in the Fort (area) and another in Byculla, as well as a school, a Mechanics' Institute, a library and a convalescent home in Pune. David Sassoon was conscious of his role as a leader of the Jewish community in Mumbai. He helped to arouse a sense of Jewish identity among the Bene Israeli and Cochin Jewish communities. The Sassoon Docks (built by his son) and the