Polonnaruwa, Cultural Triangle

Southern Ruins

A quieter corner of Polonnaruwa, holding what may be Sri Lanka’s oldest surviving library complex, its books long gone but its distinctive circular design still standing among the tree roots and troops of monkeys.

📚 Potgul Vihara: possibly Sri Lanka’s oldest library 👤 Built by Parakramabahu I 🐇 Popular monkey habitat 📏 South of the main museum, by the lake

South of Polonnaruwa’s main cluster of monuments, away from the busiest tourist paths, sits a quieter set of ruins centred on Potgul Vihara, a genuinely unusual building whose nested square walls were, by most scholarly accounts, designed to protect and store the kingdom’s books.

Quick Facts

Location	South of the museum, near the lakeside area, Polonnaruwa
Key structure	Potgul Vihara (also called Pothgul Viharaya)
Meaning of name	‘Potgul’ means ‘place to store books’
Significance	Believed to be the oldest library complex in Sri Lanka
Built by	King Parakramabahu I (1153 to 1186)
Design	Progressively smaller square walls, with a central circular structure

Commonly searched as: Southern Ruins Polonnaruwa · Potgul Vihara · Pothgul Viharaya library · Polonnaruwa quiet sites · things to do in Polonnaruwa

Possibly Sri Lanka’s Oldest Library

Potgul Vihara’s name, from the Sinhala for “place to store books,” gives a fairly direct clue to its original purpose, though scholars note that no surviving ancient text actually refers to the building by this name, leaving room for genuine uncertainty about what it was originally called. Some historical sources suggest it may have been known as Kapilla Vihara or Mandala Mandira instead. Whatever its original name, the building is generally attributed to King Parakramabahu I’s reign, sometime between 1153 and 1186, and if its function as a book repository is correctly identified, it would make Potgul Vihara the oldest library complex anywhere in Sri Lanka.

The structure’s design is genuinely distinctive: a series of square walls arranged concentrically, each progressively smaller than the one before, converging toward a small circular building at the very centre, believed to be the main area where books, likely palm-leaf manuscripts, were actually stored. Four small stupas mark the corners of the innermost square, adding a devotional element to what was primarily conceived as a practical, functional building for knowledge preservation.

A Quiet, Overgrown Corner of the Site

Not much of the original library structure remains fully intact today, and what does survive sits amid encroaching jungle, tree roots twisted through the stonework and branches shifting overhead, giving the site a genuinely atmospheric, slightly wild character quite different from the more manicured, heavily visited monuments elsewhere in Polonnaruwa. Troops of monkeys are a near-constant presence around the Southern Ruins, adding to the sense of a site that nature has partially reclaimed rather than one maintained purely for visitor convenience.

Beyond Potgul Vihara

The wider Southern Ruins area also includes a circular image house and the remains of monastic quarters clustered around it, along with additional dagobas scattered through the surrounding grounds, together suggesting this quieter southern section once functioned as a genuine, if smaller-scale, monastic community complementing the larger religious institutions found closer to the city centre.

That combination of scholarship and worship within one modest precinct reflects a broader truth about how Buddhist monastic communities across ancient Sri Lanka typically organised themselves, not solely around grand devotional monuments, but around a genuine balance of practical function, education, textual preservation, communal living, alongside religious veneration. Potgul Vihara’s library function, however uncertain its precise historical name, fits naturally into that pattern, representing the intellectual and educational side of a monastic tradition that Polonnaruwa’s larger, more famous stupas and image houses don’t fully capture on their own.

Visiting Tips

Visit as one of the final stops on a Polonnaruwa tour, given its more southerly, less central location within the park.
Bring a camera; the combination of ruins, tree roots and monkeys makes for genuinely atmospheric photography.
Keep a respectful distance from the monkey troops, and don’t feed them, both for your safety and theirs.
Allow extra time to appreciate the site’s quieter, more contemplative atmosphere compared to Polonnaruwa’s busier central monuments.

Where It Sits on the Map

Southern Ruins (Potgul Vihara), south of the museum, Polonnaruwa Open in Google Maps ↗

Frequently Asked Questions

What is Potgul Vihara believed to have been?

A library complex, possibly the oldest in Sri Lanka, based on its name meaning ‘place to store books,’ though no surviving ancient text confirms this name directly.

Who built it?

It’s generally attributed to King Parakramabahu I’s reign, between 1153 and 1186.

What does the building look like?

A series of progressively smaller concentric square walls converging on a small circular central structure, with four small stupas marking the corners of the innermost square.

Why is this area quieter than the rest of Polonnaruwa?

Its more southerly location, away from the main monument cluster, combined with encroaching jungle vegetation, gives the Southern Ruins a less-visited, more atmospheric character.

← Sri Lanka: The Complete Guide — see all 258 places by region