Built between the 7th and 12th centuries, these four Cham Towers are still actively used for worship by Cham, Chinese and Vietnamese Buddhists.

Originally the complex had seven or eight towers, but only four towers remain, of which the 28m-high North Tower (Thap Chinh), which dates from AD 817, with its terraced pyramidal roof, vaulted interior masonry and vestibule, is the most magnificent. Inside the tower, there is a statue of a goddess made of black granite, 2.6m high, sitting on a lotus-shaped stone base, leaning back on a large fig leaf-shaped stone plate. The statue is considered a masterpiece of the Cham sculpture. The other three towers are dedicated to the Indian supreme God of Shiva and his two sons, Gods Sanhaca and Ganeca.

The Central Tower (Thap Nam) was built partly of recycled bricks in the 12th century on the site of a structure dating from the 7th century. It is less finely constructed than the other towers and has little ornamentation; the pyramidal roof lacks terracing or pilasters, although the interior altars were once covered with silver. There is a linga inside the main chamber.

The South Tower (Mieu Dong Nam), at one time dedicated to Sandhaka (Shiva), still shelters a linga, while the richly ornamented Northwest Tower (Thap Tay Bac) was originally dedicated to Ganesh. To the rear of the complex is a less impressive museum with a few examples of Cham stonework.

The Ponagar Tower is not only a historical and cultural relic, but also a typical architectural and sculptural work of the Cham people. All the towers were built using bricks and decorated with stones and ceramics. So far, the Cham people’s technique on placing bricks tighter together without any kind of mortar or adhesive has remained a secret to researchers.

Every year, the locals organize the Thap Ba (Ponagar) Festival from March 20th to the 23rd according to the lunar calendar to praise the merits of Thien Y Thanh Mau Ana, the Goddess who reclaimed new lands, kept the race alive, found the rice and taught the local people to cultivate and make handicraft products.

During the festival, many religious rites and cultural activities are held in front of the main tower, including ceremonies to pray for peace, happiness and prosperity and performances of dancing, singing and acting out old stories.

To introduce and promote the unique cultural features of the Cham people, the management board of the Thap Ba Tower Complex invites Cham dancers and artisans to participate in some artistic programmes held on Saturday and Sunday nights to entertain tourists.

Visiting the complex, tourists seem to go back to the origin of the once flourishing Cham culture.