Maritsa Iztok Complex, Power plant complex in Stara Zagora Province and Sliven Province, Bulgaria.

The Maritsa Iztok Complex is a large facility spread across two provinces with three thermal power stations operating together. These stations burn lignite coal extracted from adjacent mines, with enrichment plants and rail connections supporting the entire operation.

Development of the Maritsa Iztok mining and power complex began in 1952, though the lignite deposits were already known in the mid-19th century. The first plant, TEC Brikel, started operating in 1960, and Maritsa Iztok-2 was inaugurated in 1966. The complex later expanded with Maritsa Iztok-3 in the 1970s and a new AES plant in 2011.

The complex has long been a major employer shaping daily life for thousands of residents across the region. The industrial facilities form part of local identity, showing how people built their economic foundation.

This facility spans a wide area across multiple sites linked by roads and rail infrastructure. The complex is not open for casual visits due to safety requirements, though portions may be visible from nearby roads and viewpoints.

The mines and power stations are mutually dependent: the mines' only coal market is the plants, and the plants have no other supplier. The mines work three open pits — Troyanovo 1, Troyanovo-Sever and Troyanovo 3 — and in 2021 produced 96% of Bulgaria's coal.