Since its inauguration on the 25th August, 1799, this theatre has undergone numerous alterations. The first of these took place in 1858, when the architect José de Yarza transformed the interior of the primitive coliseum and increased its capacity. At present it has 1,100 seats and its current interior appearance is the work of D. Ricardo Magdalena (1896), who was also responsible for the rear, eclectic, neo-classical façade The principal façade was remodelled by the Borobio brothers in 1940, when it still had classic columns. The curtain was painted by Marcelino Unceta and is still in use today.
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