Old Hemp Factory, Edessa, Industrial heritage building in Edessa, Greece.

The Old Hemp Factory sits near Edessa Waterfalls and displays early 20th-century industrial design with large windows and brick walls characteristic of mills from that era. The structure stretches across a considerable area with multiple connected sections for different production stages.

The factory was founded in 1908 by the Totskas and Co. company and smaller shareholders from Thessaloniki, who chose Edessa for its waterfalls to power the machinery by water. It was the largest of Greece's four hemp factories, employing 150 workers in 1928–1940 and supplying rope across the country. Work stopped in May 1966, and the state took ownership after a failed 1967 loan attempt.

Workers called the rope made here "Pella" twine, and in 1966 the 100 employees formed the "Productive Cooperative Pella" to run the plant themselves after the company stopped. Coarse ropes went to Crete, Thessaly and Epirus, thin twine to Eastern Macedonia and Thrace, with distribution stalling each October to March. Since 1997 the complex has been a branch of the Edessa Open-Air Water Museum.

Visitors can view the exterior while walking through the waterfall area, but the building is not open for interior access. The surrounding paths provide good viewing points to see the architecture from different angles.

The facility tapped directly into the power of nearby waterfalls through a mechanical system of wheels and belts to transform raw hemp into rope. This direct use of falling water made the factory location possible without needing outside power sources.