Qutb ud-Din Aibak in the context of "Iltutmish"

The Delhi Sultanate or the Sultanate of Delhi was a late medieval empire primarily based in Delhi that stretched over large parts of the Indian subcontinent for more than three centuries. The sultanate was established in 1206 in the former Ghurid territories in India. The sultanate's history is generally divided into five periods: Mamluk (1206–1290), Khalji (1290–1320), Tughlaq (1320–1414), Sayyid (1414–1451), and Lodi (1451–1526). It covered large swaths of territory in modern-day India, Pakistan, Bangladesh, as well as some parts of southern Nepal.

The foundation of the Sultanate was established by the Ghurid conqueror Muhammad Ghori, who routed the Rajput Confederacy, led by Ajmer ruler Prithviraj Chauhan, in 1192 near Tarain in a reversal of an earlier battle. As a successor to the Ghurid dynasty, the Delhi Sultanate was originally one of several principalities ruled by the Turkic slave-generals of Muhammad Ghori, including Taj al-Din Yildiz, Qutb ud-Din Aibak, Bahauddin Tughril and Nasir ad-Din Qabacha, that had inherited and divided the Ghurid territories amongst themselves. Khalji and Tughlaq rule ushered a new wave of rapid and continual Muslim conquests deep into South India. The sultanate finally reached the peak of its geographical reach during the Tughlaq dynasty, occupying most of the Indian subcontinent under Muhammad bin Tughluq. A major political transformation occurred across North India, triggered by the Central Asian king Timur's devastating raid on Delhi in 1398, followed soon afterwards by the re-emergence of rival Hindu powers such as Vijayanagara Empire and Kingdom of Mewar asserting independence, and new Muslim sultanates such as the Bengal and Bahmani Sultanates breaking off. In 1526, Timurid ruler Babur invaded northern India and conquered the Sultanate, leading to its succession by the Mughal Empire.

The Muslim conquests on the Indian subcontinent mainly took place between the 13th and the 18th centuries, establishing the Indo-Muslim period. Earlier Muslim conquests on the Indian subcontinent include the invasions which started in the northwestern Indian subcontinent (modern-day Pakistan), especially the Umayyad campaigns in India. Later during the 8th century, Mahmud of Ghazni, sultan of the Ghaznavid Empire, invaded vast parts of Punjab and Gujarat during the 11th century. After the capture of Lahore and the end of the Ghaznavids, the Ghurid ruler Muhammad of Ghor laid the foundation of Muslim rule in India in 1192. In 1202, Muhammad Bakhtiyar Khalji led the Muslim conquest of Bengal, marking the easternmost expansion of Islam at the time.

The Ghurid Empire soon evolved into the Delhi Sultanate in 1206, ruled by Qutb ud-Din Aibak, the founder of the Mamluk dynasty. With the Delhi Sultanate established, Islam was spread across most parts of the Indian subcontinent. In the 14th century, the Khalji dynasty under Alauddin Khalji, extended Muslim rule southwards to Gujarat, Rajasthan, and the Deccan. The successor Tughlaq dynasty temporarily expanded its territorial reach to Tamil Nadu. The disintegration of the Delhi Sultanate, capped by Timur's invasion in 1398, caused several Muslim sultanates and dynasties to emerge across the Indian subcontinent, such as the Gujarat Sultanate, Malwa Sultanate, Bahmani Sultanate, Jaunpur Sultanate, Madurai Sultanate, and the Bengal Sultanate. Some of these, however, were followed by Hindu reconquests and resistance from the native powers and states, such as the Telugu Nayakas, Vijayanagara, and Rajput states under the Kingdom of Mewar.

The Sena dynasty was a Hindu dynasty during the early medieval period on the Indian subcontinent, that ruled from Bengal through the 11th and 12th centuries. The empire at its peak covered much of the north-eastern region of the Indian subcontinent. The Palas of Bengal were succeeded by the Sena Dynasty.

The dynasty's founder was Samanta Sena. After him came Hemanta Sena, who usurped power and styled himself king in 1095 AD. His successor Vijaya Sena (r. 1096–1159) helped lay the foundations of the dynasty and had an unusually long reign of over 60 years. Ballala Sena conquered Gaur from the Pala, became the ruler of the Bengal Delta, and made Nadia the capital as well. Ballala Sena married Ramadevi a princess of the Western Chalukya Empire which indicates that the Sena rulers maintained close social contact with south India. Lakshmana Sena succeeded Ballala Sena in 1179, ruled Bengal for approximately 20 years, and expanded the Sena dynasty to Odisha, possibly up to Varanasi. In 1203–1204 AD, Qutbuddin Aibak's (r. 1206–1210) protégé, Muhammad Bin Bakhtiyar Khalji, a general under the Ghurid Empire, launched an invasion and captured the capital city of Nadia. However Navadvip was not the permanent capital of the Sena rulers. The detailed account of this invasion is given in Tabaqat-i Nasiri.

The Qutb Minar, also spelled Qutub Minar and Qutab Minar, is a minaret and victory tower, built during the Delhi sultanate, and comprising the Qutb complex, a UNESCO World Heritage Site in Mehrauli, South Delhi, India. It was mostly built between 1199 and 1220, contains 399 steps, and is one of the most-frequented heritage spots in the city. After defeating Prithviraj Chauhan, the last Hindu ruler of Delhi before the Ghurid conquest of the region, Qutab-ud-din Aibak initiated the construction of the victory tower, but only managed to finish the first level. It was to mark the beginning of Islamic rule in the region. Successive dynasties of the Delhi Sultanate continued the construction, and, in 1368, Firuz Shah Tughlaq rebuilt the top parts and added a cupola.

It can be compared to the 62-metre all-brick Minaret of Jam in Afghanistan, of c. 1190, which was constructed a decade or so before the probable start of the Delhi tower. The surfaces of both are elaborately decorated with inscriptions and geometric patterns. The Qutb Minar has a shaft that is fluted with "superb stalactite bracketing under the balconies" at the top of each stage. In general, minarets were slow to be used in India and are often detached from the main mosque where they exist.

Shams ud-Din Iltutmish (Persian: شمس الدین ایلتتمش, 1192 – 30 April 1236) was the third Sultan of Delhi from 1211 to 1236. He was from the Mamluk dynasty, who ruled the former Ghurid territories in northern India. He was the first Muslim sovereign to rule from Delhi, and is thus considered the effective founder of the Delhi Sultanate.

Sold into slavery as a young boy, Iltutmish spent his early life in Bukhara and Ghazni under multiple masters. In the late 1190s, the Ghurid slave-commander Qutb ud-Din Aibak purchased him in Delhi, thus making him the slave of a slave. Iltutmish rose to prominence in Aibak's service, and was granted the important iqta' of Badaun. His military actions against the Khokhar rebels in 1205–1206 gained attention of the Ghurid ruler Muhammad of Ghor, who manumitted him even before his master Aibak was manumitted.