The Athens Metro is operated by STASY S.A () (Statheres Sygkoinonies S.A) which is a subsidiary company of OASA (Athens urban transport organisation) and provides public transport throughout the Athens Urban Area. While its main purpose is transport, it also houses Greek artifacts found during construction of the system. The Athens Metro runs three metro lines, namely Line 1 (Green Line), Line 2 (Red Line) and Line 3 (Blue Line) lines, of which the first was constructed in 1869, and the other two largely during the 1990s, with the initial new sections opened in January 2000. Line 1 mostly runs at ground level and the other two (Line 2 & 3) routes run entirely underground. A fleet of 42 trains, using 252 carriages, operates on the network, with a daily occupancy of 1,353,000 passengers.