The siege of Golconda occurred in January 1687, when Mughal Emperor Aurangzeb led his forces to besiege the Qutb Shahi dynasty at Golconda Fort (also known as the Diamond Capitol of its time) and was home to the Kollur Mine. The ruler of Golconda was the well entrenched Abul Hasan Qutb Shah. Aurangzeb and the Mughal army had successfully conquered two Muslim kingdoms: Nizamshahis of Ahmednagar and the Adilshahis of Bijapur. It was only a matter of time that the Mughal army arrived at Golconda Fort. The siege of Golconda lasted 8 months and on various occasions it had pushed the massive Mughal army to its limits, in fact the Golconda Fort was probably the most impregnable fort in the Indian subcontinent. Aurangzeb and the Mughals entered Golconda through a decisive victory.