Pirquet- Gertrude M. (Rosenauer), 93 of Concord formerly of Belmont, on May 1, 2017. Loving mother of Flora Pirquet and her husband Gary Beckmann of Arlington and Nora Pirquet and her husband Raymond Froehlich of San Francisco, CA. Beloved grandmother of Agnes and Michaela Beckmann and Owen and Lukas Froehlich.Also survived by other relatives and friends. All are welcome to visit Wednesday May 10 at 9:00am in St. Peter's Church 100 Concord Avenue, Cambridge, Funeral Mass to commence at 10:00am. Burial is Private.In lieu of flowers donations may be made in Gertrude's memory to: The Perkins School for the Blind 175 North Beacon St., Watertown, MA 02472.To send an online condolence, visit devitofuneralhomes.com