The Calcutta Rajdhani Express was introduced in 1969 with a maximum allowed speed of 120km/h, which was then the new speed limit for trains in India.
Construction of India’s first subway system began in Calcutta in 1973. In 1986, the first section of the subway system, the first in India, was opened in the city.
In spite of the establishment of Medical College in 1835, the hospital started operating thirteen years later. On 1st December,1852, this hospital was inaugurated with 500 beds.
Greater Kolkata has more than 30 museums, which cover a wide variety of fields. The Indian Museum, founded in 1814, is the oldest in India and is the largest museum of its kind in the country. It is the ninth oldest regular museum of the world, and is the oldest institution of its kind in Asia Pacific region.
National Library is the largest library in India.
The oldest hotel in Calcutta is the Great Eastern Hotel, which was built in 1835 by David Wilson. However the first hotel to come up in Calcutta was built by John Spence in 1830.
The first currency bill of India was printed by the British from a Calcutta mint in 1757.
Kolkata is sister city to Long Beach, California.
Kolkata was the original headquarters of IBM Corporation in India before shifting to Bangalore on its return to operations in the country.
Till March 2006, Kolkata's oldest resident was the Adwaita, the 255 year old giant Aldabra Seychelles tortoise, whose residence was the 131 year old Alipore Zoological Gardens.