Paramesvara Vinnagaram is an early example of Dravidian architecture. The temple has a rectangular plan and approached through a flat granite gateway tower. The
vimana has a stepped pyramidal roof and it resembles a
vihara. Three sanctuaries host the image of
Vishnu in different postures - seated (ground floor), lying (first floor; accessible to devotees only on
ekadashi days) and standing (second floor; inaccessible to devotees). The logical and complex plan of the temple provided a prototype for the much larger shrines to be constructed all over
Tamil Nadu. The external cloisters, with their lion pillars, are predecessors of the grand thousand pillared halls of later temples. In modern times, the four lions have been replaced with
Garuda (image of eagle mount of Vishnu). The cloister walls have a sequence of relief sculptures depicting the history of the Pallava dynasty. The first set of panels show the supposedly divine lineage of the Pallavas starting from
Brahma, followed by
Angiras (sage),
Bṛhaspati,
Bharadvaja,
Drona and
Ashwatthama. These panels are followed by panels depicting the actual Pallava kings themselves. A typical panel shows the king on the left frame of the panel. In some cases, the coronation of the king is shown as can be seen by priests pouring
sacred water on his head. The right side of the panel shows battle scenes or other events during that monarch's reign. The panels of
Mahendravarman I and
Narasimhavarman I show the battles with
Pulakesin II of the
Badami Chalukyas. Finally, there are panels that show the search and the finding of a successor after
Paramesvaravarman II's early death. The successor was found and became
Nandivarman II, who built this temple. The niches on the walls around the sanctum are similar to the ones in
Mahabalipuram. Some of the sculptures depict various events from the
Mahabaratha, depicting the images of
Dharmaraja,
Arjuna and
Bhima. The temple is built of granite with a mixture of sandstone. The three storied temple is the forerunner for various later built temples like
Vaikunta Perumal temple at
Uthiramerur,
Koodal Azhagar temple at
Madurai and
Rajagopalaswamy temple at
Mannargudi. The three stories are achieved with three concentric squares with a small passage in between with the top layer being closed by a filial. ==Festivals and religious practices==