Pedro Máximo Oliveira Sayán (Lima; October 15, 1882 — Buenos Aires; June 18, 1958) was a Peruvian lawyer, jurist, professor, diplomat and politician.

[2] He began his political activism in the National Democratic or "futurist" Party, founded by José de la Riva-Agüero y Osma, in which Julio C. Tello was also a member.

[4] From 1920 to 1922, under the second government of Augusto B. Leguía, he served as minister plenipotentiary in Colombia, a period under which the controversial Salomón-Lozano Treaty was signed in Lima, which resolved the Colombian-Peruvian territorial dispute.

[2] In 1922 he became a member of the commission to reform the Civil Code, along with Manuel Augusto Olaechea [es], Alfredo Solf y Muro and Hermilio Valdizán (all of them professors from San Marcos), and Juan José Calle, prosecutor of the Supreme Court.

[2][11] This was done through the so-called "delegated legislation", which is when Congress allows technical commissions to prepare laws of a specialized nature and omits to enter into the detailed discussion of them.

[17][14][16] According to Schwend, represented by Senator David Aguilar Cornejo, she had been pursued by Sartorius in his white Morris Mini-Minor while she was driving her cherry Buick late at night, returning from a date with a lawyer despite being married.

[14] This version of events was challenged by Raúl Peña Cabrera, who represented Olenka Dudek, a Polish-Peruvian socialite and widow of Sartorius.

This version of events was also shared by the Peruvian Investigative Police (PIP), but opposed by the general public, who overwhelmingly supported Schwend's story.