The 18th-century palace with four courtyards (‘pathinaru kettu’) and conforming to the vasthu architecture of Travancore is bearing a rich legacy in the evolution of Malayalam literature. Anandhapuram palace had witnessed the birth of many Malayalam and Sanskrit works of Valiya Koyithampuran. Fifth generation descendants of the Thampuran are now living in the palace. The structure is constructed in ‘surki,’ a mixture of lime and clay, and the roof in wood. Now, the roofing structure is facing termite attacks. Valiya Koyithampuran had stayed in the palace for more than five years after being placed under house arrest from 1875 to 1880 by Travancore king Ayilyam Thirunal. Among the noted works he created during the time are ‘Kshamapana Sahasram,’ ‘Yamapranama Sathakam’ and ‘Visakha Vijayam’. The thread of his celebrated poem ‘Mayura Sandesam’ was also derived during his life in the palace.Thampuran had married Rani Lakshmi Bayi of Travancore Palace in 1859 and later came to stay there. As he had no children, the building was handed over to his sisters. Their ancestors have been living there since. The library and books in various languages used by Thampuran are preserved here.