The Lahore Museum, founded in 1865, held the principal collection of Punjab's art and archaeology: Gandhara sculpture, Sikh period painting, coins, manuscripts, arms.
In 1948 the collection was divided between the two dominions on an agreed formula, generally described as a sixty to forty split. Objects were crated and moved to Amritsar and Delhi. The division was made quickly, by officials, against lists.
The Central Museum at Lahore kept the larger share. The Indian portion went partly to what became the Government Museum and Art Gallery at Chandigarh, which is why a Le Corbusier building in a city built in the 1950s holds Gandhara sculpture excavated in the 1880s.
The Zamzama gun stayed at Lahore. The Sikh royal treasures had largely gone to London in 1849.
The Toshakhana material, the Koh-i-Noor, the throne of Ranjit Singh Ji now in the Victoria and Albert Museum, and a great deal else, is in Britain. The Punjab's material history is split three ways and no catalogue lists it as one collection.
The collections of undivided Punjab were divided in 1947 on a formula, with a share of the Lahore museum's holdings sent to India and eventually to Chandigarh and Patiala.
The division cut collections that had been assembled as wholes. Gandhara sculpture, coins, manuscripts and paintings were split by count rather than by coherence.
A large part of the region's material is also in London, taken as loot after 1849 or acquired afterward, including objects from the Lahore treasury.