The history of Siddavatam Fort is layered, reflecting the changing dynasties that controlled the region. Originally built by the Mattaraja dynasty in the 13th century, it later came under the rule of the Vijayanagara Empire, who significantly expanded and fortified it. The fort then passed into the hands of the Golconda Sultanate and the Nawabs of Kadapa. Each dynasty left its mark on the fort's architecture and structure. The fort served as a crucial military outpost and a center of administration for centuries. Today, the remnants of this rich history can be seen in the fort's surviving structures, including temples, mosques, and palaces, offering a tangible connection to the past.