The Teatro Colón (Spanish: Columbus Theatre) is the main opera house in Buenos Aires, Argentina. It is considered one of the ten best opera houses in the world by National Geographic, and is acoustically considered to be amongst the five best concert venues in the world.The present Colón replaced an original theatre which opened in 1857. Towards the end of the century it became clear that a new theatre was needed and, after a 20-year process, the present theatre opened on 25 May 1908, with Giuseppe Verdi's Aïda. The Teatro Colón was visited by the foremost singers and opera companies of the time, who would sometimes go on to other cities including Montevideo, Rio de Janeiro and São Paulo. After this period of huge international success, the theatre's decline became clear and plans were made for massive renovations. After an initial start of works to restore the landmark in 2005, the theatre was closed for refurbishment from October 2006 to May 2010. It re-opened on 24 May 2010, with a programme for the 2010 season.