After the existing new Collectorate building was opened in 2015 near Tamil University, the 120-year-old British-era collectorate building constructed in Indo-Saracenic architecture near Thanjavur combined court building was transformed into a museum. The building served as the headquarters of the erstwhile combined Thanjavur district.
10 commodities belonging to Thanjavur that obtained GI tag were also displayed at the museum. The agriculture department displayed the conventional types of farm equipment, granite, metal idols, traditional weaving equipment, Thanjavur art plates and rocking dolls.