was established at Rajahmundry. The Reddis were known for their fortifications. Two major hill forts, one at Kondapalli, 20 km north west of Vijayawada and another at Kondavidu about 30 km west of Guntur stand testimony to the fort building skill of the Reddi kings. The forts of Bellamkonda, Vinukonda and Nagarjunakonda in the Palnadu region were also part of the Reddi kingdom. The dynasty remained in power till the middle of the 15th century. In 1424, Kondavidu was annexed to the Vijayanagara Empire and Rajahmundry was conquered by the Gajapatis some twenty five years after. The Gajapatis eventually lost control of coastal Andhra after the defeat of Gajapati Prataprudra Deva by Krishna Deva Raya of Vijayanagara. The territories of the Reddi kingdom thus came under the control of the Vijayanagara Empire. Religion The Reddi rulers played a prominent part in post-Kakatiyas of Telangana. The Kakatiya empire came to an end in 1323 after the army of the Delhi sultanate invaded Warangal and captured Kakatiya ruler Pratapa Rudra. Warangal fell to the invaders and Ulugh Khan commanded Warangal and Telangana. During this time of foreign invasion and chaos in Telugu country, seeds of revolt were sown by two princes, Annaya Mantri and Kolani Rudradeva. It was during this chaotic period in Andhra history that Prolaya Vema Reddi established the Reddi kingdom in 1325. The Reddi rulers patronised and protected Hinduism and its institutions. The Brahmins were given liberal grants by the Reddi kings and the agraharas of Brahmins were restored. Vedic studies were encouraged. The Hindu temples of Srisailam and Ahobilam were provided with more facilities. Prolaya Vema Reddi bestowed a number of agraharas on the Brahmins. He was revered by the title of Apratima-Bhudana-Parasurama. He commissioned major repairs to the Srisailam Mallikarjuna Swami temple, and had a flight of steps built from the Krishna River to the temple. The Narasimha Swamy temple at Ahobilam was built during his reign. He built 108 temples for Shiva. Literature Telugu literature blossomed under the Reddi kings. The Reddi kings also patronized Sanskrit. Several of the Reddi kings themselves were distinguished scholars and authors. Kumaragiri Reddi, Kataya Vema Reddi and Pedakomati Vema Reddi were the most outstanding among them. Errapragada (Errana), Srinatha and Potana were the remarkable poets of this period. Errapragada, the last of the Kavitraya (Trinity of Poets) was the court poet of Prolaya Vema Reddi. He completed the Telugu translation