Mihintale Katu Seya
It is believed that this sthupa was built by enshrining the equipment such as tools that were used to construct the Mihintale Monastic Complex. This has been identified as "Katu Seya" which is mentioned in a slab inscription of King Mihindu IV. It mentions that the lands offered to this sthupa must managed by the officers who tool care of Eth Vehera. The time of construction of this sthupa can not be mentioned definitely and it can be assumed that it was constructed after the ancient temple complex was built at Mihintale. The bottom part of the Katu Seya which is small in size is built with granaite and the upper part has been constructed with bricks. In the year 1941 this has been declared a protected monument by the Archaeological Department.
Furthermore, in an excavation conducted in the early 19th century of area around the sthupa, copper plates with inscriptions of the Mahayana Sutra verses in Sanskrit and Sinhala written between the 8th and 9th century had been discovered from the site. The evidence gleaned from the architectural features of the Sthupa centered monastic complex of the Mahayana tradition has established that it belonged to the Anuradhapura period.
Furthermore, in an excavation conducted in the early 19th century of area around the sthupa, copper plates with inscriptions of the Mahayana Sutra verses in Sanskrit and Sinhala written between the 8th and 9th century had been discovered from the site. The evidence gleaned from the architectural features of the Sthupa centered monastic complex of the Mahayana tradition has established that it belonged to the Anuradhapura period.