Red Fort was built in the 17th century on the banks of the Yamuna River in Delhi. It served as the seat of power for the Mughal Empire for over 200 years, witnessing periods of turmoil and the establishment of an independent Indian republic. Shah Jahan chose the site for its central location in his empire and to design a palace blending Persian, Mughal, European, and Indian architectural styles. Construction began in 1639 based on advice from Hindu and Muslim scholars that the site and date were astrologically auspicious. India was united for the first time within Red Fort's walls in 1857 and in 1947 when Nehru hoisted the Indian flag, marking the country's independence.