The National Archives or Archivo General de la Nación (formerly known as the Palacio Negro de Lecumberri) contain a significant part of Mexico's written history. Lecumberri was begun in 1885 as a prison when then San Lázaro area was at the city's periphery. Construction took 15 years and 2.5 million pesos and was inaugurated in 1900 as the most modern prison in Latin America. The prison was the scene of the incarceration and execution of Francisco I. Madero and José María Pino Suárez in 1913. By the 1970s, the prison had as many as 5,000 prisoners in 1,000 cells. The prison was closed by the end of the decade and renovated to its current use.