This theater opened in 1902 is the most technically advanced in Spain. Its design facade is of the Basque-French Jean Batiste Darroquy , richly decorated, which is the external reference of this important piece of modernist architecture in the Basque Country. In April of 1978 a bomb put by ETA military in the stalls caused great damage to the theater.The architects Rufino and Pedro Basáñez carried out the repair works aimed at the conservation and restoration of the building that was reopened in August 1980. In the 1990s it was the headquarters of the Bilbao Symphony Orchestra which is now housed at the Palacio Euskalduna. The theater was subsequently remodeled and expanded and reopened in 2010 and is now used by several theater companies .