The Group of Monuments at Mahabalipuram is a collection of 7th- and 8th-century CE religious monuments in Tamil Nadu, India and a designated UNESCO World Heritage Site. The site has 40 ancient monuments and Hindu temples, including one of the largest open-air rock reliefs in the world: the Descent of the Ganges or Arjuna's Penance. The group contains several categories of monuments: ratha temples with monolithic processional chariots, built between 630 and 668; mandapa viharas (cave temples) with narratives from the Mahabharata and Shaivic, Shakti and Vaishna inscriptions in a number of Indian languages and scripts; rock reliefs (particularly bas-reliefs); stone-cut temples built between 695 and 722, and archaeological excavations dated to the 6th century and earlier. The monuments were built during the Pallava dynasty.
The Shiva temples along the shore have been dated to the early 8th century and are attributed to the reign of the Pallava king Rajasimha (700-728 AD).
It is speculated that this city is the seaport of Sopatma mentioned in the 1st-century Periplus of the Erythraean Sea or Ptolemy's port of Melange in his 2nd-century Geographia.
When Marco Polo arrived in India in the 13th century, on his way back to Venice from Southeast Asia, he mentioned "Seven Pagodas" and the name became associated with the shore temples of Mahabalipuram in publications by European merchants centuries later.