The Jetavanaramaya is the world’s tallest stupa with a height of 122 meters (400 ft) and is the third tallest structure in the world. A stupa or Buddhist monument amidst the ruins of the Jetavana monastery in Anuradhapura, a world heritage city. After the destruction of the Mahavihara, he began the construction of the stupa. His son Magavanna I completed the construction of the stupa. The sacred relics are believed to be part of a bag or belt tied by the Lord Buddha. The history of the island is important because it depicts the tensions of Buddhist Theravada and Mahayana sects. King 12Parkramabhu in the 12th century tried to restore this stupa and rebuilt it to its present height. Today it is 232 feet (71 meters).
Dagaba is no longer the tallest, but it is still the largest and covers an area of 233,000 m2 (2,508,000 square feet).  About 93.3 million bricks were used for its construction; The engineering skills behind the construction of the structure is a significant development in the history of the island. This stupa also represents the sectarian division among Buddhist monks. This stupa belongs to the Sagalika sect. The compound is about 5.6 hectares and houses 10,000 Buddhist monks. One side of the stupa is 576 feet (176 m) long, and the flight of stairs on either side is 28 feet (9 m) wide. The temple gate in the courtyard is 27 feet (8 m) high. The Mahavamsa mentions that the stupa had an 8.5 m (28 ft) deep foundation and diluted copper plates and sesame oil arsenic over the foundation to prevent insect and plant invasion. It took 15 years to complete the Jetavanarama monastery and it is estimated that hundreds of skilled workers, including bricklayers, bricklayers and quarries, would be needed. Inscriptions in the courtyard show the names of those who donated the building.
Today, the stupa is preserved to bring it back to its ancient glory. You can still see the giant trees that stood on the places where the restoration work had not begun.