The celebration of the 100th anniversary of Argentina’s emancipation from Spain (the Centenario, or Centenary) was a cultural milestone. Social and cultural organizations as well as individuals joined the state in its efforts to commemorate the event by planning public festivities, inviting foreign dignitaries and intellectuals, as well as commissioning projects of urban reform, artworks, and book collections. This chapter examines how occasional literature addressed this pivotal moment in Argentina’s history as established and emerging writers discussed the country’s past and future. It discusses how Leopoldo Lugones’ Odas seculares, Alberto Gerchunoff’s The Jewish Gauchos, Ada María Elflein’s Del Pasado as well as nationalist book collections discussed the country’s cultural traditions vis-à-vis the arrival of millions of immigrants, the introduction of electoral reforms, and the emergence of a dissident form of political, social and cultural engagement. While the occasional literature produced in the year 1910 conveys a sense of optimism about Argentina’s historical ascent as a one of the world’s wealthiest nations, the political and cultural challenges resulting from the continuous flow of foreigners and the expansion of democratic participation after 1910 contributed to darken the triumphant mood that permeated the anniversary.