YPF Tower is a corporate high-rise building designed by internationally recognized architect César Pelli and is the headquarters of Argentine national oil company YPF. Construction began in 2005, in the Puerto Madero barrio (district) of Buenos Aires, Argentina and the office building was completed in September 2008. The building is 160 metres (520 ft) tall and has 44 floors. It was, upon completion in 2008, the tallest office building in Argentina, and the third tallest overall. The building is located on the corner of Macacha Güemes and Juana Manso streets, in the Puerto Madero ward.