Children at an elementary school in Santiago de SurcoThe first settlement in what would become Lima was made up of 117 housing blocks. In 1562, another district was built across the Rímac River and in 1610, the first stone bridge was built. Lima then had a population of around 26,000; blacks made up around 40% and whites made up around 38%. By 1748, the white population totaled 16,000–18,000. In 1861, the number of inhabitants surpassed 100,000 and by 1927, had doubled.