Construction started during the second government of Augusto B. Leguía (1919–1930) and finished under the presidency of Óscar R. Benavides, who inaugurated the building in the late 1930s. The Palace was built in a neoclassical style as its plans were based on those of the Law Courts of Brussels, Belgium, work of Joseph Poelaert.
The construction of the Palace began during the second government of Augusto B. Leguía (1919–1930) and concluded under the presidency of Óscar R. Benavides, who officially opened it in the late 1930s. The building was designed in a neoclassical style, reflecting the influence of Joseph Poelaert's work on the Law Courts of Brussels, Belgium.