Pirdop copper smelter and refinery is the biggest facility for smelting and refining of copper in South-Eastern Europe.

The factory is situated between the towns of Pirdop and Zlatitsa in the Sofia Province, western Bulgaria.

[2] In addition, it produces 830,000 tons of sulfuric acid and small amounts of silver, gold and selenium.

[3] The main chimney of the smelter is 325.4 metres tall, 0.4 metres taller than the Maritza East power stations chimneys and 2 metres taller than the Eiffel Tower.

In 1997, the company was sold to Cumerio a company from Belgium for US$80 million[4] becoming Cumerio Med; at the time it was Bulgaria's largest copper smelting company, producing around 240,000 tonnes of smelted copper and around 60,000 tonnes of copper cathodes each year.