RIDLEY >> When the 2018-19 school year commences and the doors open at Notre Dame de Lourdes School on Sept. 5, the students and faculty will officially welcome their new principal, Diana Pileggi, who assumed the leadership role on July 1.Additionally, the Rev. Joseph Devlin, who was installed as pastor of Our Lady of Peace Church on June 17, is also new to his leadership role at Notre Dame de Lourdes School, located in the Swarthmorewood section of the township.