Simplify the following text for a Grade 11 native English-speaking person.
Original: The dynasty was founded by Mir Qamar-ud-Din Siddiqi , a viceroy of the Deccan under the Mughal emperors from 1713 to 1721 and who intermittently ruled under the title Asaf Jah in 1724 , and after Aurangzeb 's death in 1707 , the Mughal Empire crumbled and the viceroy in Hyderabad , the young Asaf Jah , declared himself independent .
Simplified: The dynasty was founded by Mir Qamar-ud-Din Siddiqi , a viceroy of the Deccan under the Mughal emperors from 1713 to 1721 . After Aurangzeb 's death in 1707 , the Mughal Empire fell apart and the viceroy in Hyderabad said he was independent .