The Taj Mahal was commissioned by Shah Jahan in 1631, to be built in the memory of his wife Mumtaz Mahal, a Persian princess who died giving birth to their 14th child, Gauhara Begum. Construction of the Taj Mahal began in 1632.The imperial court documenting Shah Jahan's grief after the death of Mumtaz Mahal illustrate the love story held as the inspiration for Taj Mahal. The principal mausoleum was completed in 1643 and the surrounding buildings and garden were finished about five years later.
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Agra Fort is a historical fort in the city of Agra in India. It was the main residence of the emperors of the Mughal Dynasty till 1638, when Mughal capital was shifted from Agra to Red Fort in Delhi. It is also a UNESCO World Heritage site and is about 2.5 km northwest of its more famous sister monument, the Taj Mahal. The fort can be more accurately described as a walled city.
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Sikandra is the mausoleum of Akbar. Akbar himself started construction of this beautiful monument. This structure has a perfect blending of Hindu, Christian, Islamic, Buddhist, Jain themes. Sikandra is named after Sikandar lodi, the Delhi ruler who was in power from 1488 to 1517.
Source: wikipedia
Fatehpur Sikri is a city in the Agra District of Uttar Pradesh, India. The city was founded in 1569 by the Mughal Emperor Akbar, and served as the capital of the Mughal Empire from 1571 to 1585, when it was abandoned. After his military victories over Chittor and Ranthambore, Akbar decided to shift his capital from Agra to a new location to honour the Sufi saint Salim Chishti.
Source: Wikipedia