sentences:  In 2006 a full restoration work was started that would extend until 2010, when it was reopened on May 24 in commemoration of the Bicentennial of Argentina.The first Teatro Colón was designed by Charles Pellegrini, and proved to be a successful venue for over 30 years, with 2,500 seats with the inclusion of a separate gallery reserved only for people who were in mourning.The construction started in 1856 and completed in 1857.