Agios Nikolaos Foundoukli church, Medieval church near Mount Profitis Ilias, Greece.

Agios Nikolaos Foundoukli is a 15th-century Byzantine chapel built as a four-conch (tetraconch) structure, with a dome whose drum holds alabaster windows. Well-preserved frescoes cover the interior walls, showing the donor's three children with their parents and small motifs such as a frog and cats. The rebuilt dome itself no longer carries frescoes.

Agios Nikolaos Foundoukli is a 15th-century Byzantine chapel. According to legend, a high official had it built as a four-conch structure after his three children died in an epidemic. In the early 20th century the church threatened to collapse; the Italians, then the occupying power, propped it up and rebuilt the dome, which therefore holds no frescoes.

The interior paintings show religious figures and biblical scenes that visitors can still see today, reflecting how Eastern Orthodox faith was expressed through visual art during the medieval period.

The site is reachable by private vehicle, taxi, or organized tours and sits near Mount Profitis Ilias in a rural setting. Visitors should plan ahead since the location is remote and weather conditions can affect access.

The chapel stands beside the road from Eleousa toward Profitis Ilias, and the local fire brigade regularly posts lookouts here to spot forest fires early. A well across the road offers a chance to cool off, and fig trees surround the slope at the foot of the mountain.