One of the most significant Mughal structures, carrying some of the most spectacular tile mosaic examples, is the Gulabi Bagh Gateway. It is located on the northern side of G.T. Road, east of Buddhu's Tomb, and past Begampura Road on the left. Although of considerable height (it is a two storey structure), it can be missed easily since it does not carry a dome, or other terminating elements, As is evident from its name, this remarkable gateway was originally the entrance to a garden known as Gulabi Bagh or (the rose garden), no longer extant. The name however, is also a chronogram, from which the date of construction of the gateway AH 1066 (1655) is obtained.

Although the gateway has endured much damage to its decorative features, it is in a tolerably well-preserved state. It was constructed by or in memory of Mirza Sultan Beg, a Persian nobleman and cousin of Shah Jahan's son-in-law Mirza Ghiyasuddin (married to princess Sultan Begam).

Due to his cousin's relationship with the royal family, Mirza Sultan Beg rose to the exalted position of Mir-ul-Bahar (Admiral of the Fleet). He was obviously on extremely good terms with the emperor, who, aware of his love of hunting, presented him with a much-admired English rifle. Just two months later, the firearm proved fatal for him due to the bursting of a shell during a hunting expedition at Hiran Minar at Sheikhupura. He died in 1063/1657.

A lofty Timurid aiwan—a popular architectural rendering for gateways—rises to two-storey height, and incorporates a 40' long covered walkway defined by a single storey cusped arch gateway. The aiwan is flanked on both sides with 5' deep arched alcoves expressive of the two storeys of the structure. The covered walkway is lined on either sides with a 12'x12' chamber, which no doubt provided accommodation to the guards, from where an internal staircase leads to the first floor.

The 50' wide facade, subdivided into slightly sunken panels presents one of the finest examples of kashi kari (tile mosaic). The panels are defined by brick borders, which, as was usual, would have been treated with taza kari or lines of red fresco. Profusely embellished with multi-hued, scintillating tile mosaic, based largely on floral themes including floral arabesque, it is considered one of the most important tile-mosaic examples of the Mughal period. The rendering of floral and geometric themes executed in finely cut tile mosaic, with an interesting combination of hues of blue, yellow, maroon and green, became a favorite medium of decoration during Shah Jahan's time.

This architectural masterpiece is one of many structures of the period where humble brick was given an exciting veneer of beautifully crafted tile mosaic, cut to the exact form of a petal or a leaf and then closely joined together, to present this unique artwork. Today, it is divorced from its chahar bagh setting, but would have been a spectacular monument—located as it would have been amidst verdant surroundings. It is said to have been a large garden with beautiful pavilions, arches, paved floors, and gateways at all four corners. A little way inside the surviving gateway is the tomb of Dai Anga.