English: The choir of the Maastricht Armenian Apostolic Church during mass in the westwork of the Roman Catholic Basilica of Saint Servatius in Maastricht, the Netherlands. The service was part of the 2018 Heiligdomsvaart ("pilgrimage of the relics"), a religious and historic event that takes place every seven years and dates back to the Middle Ages. The Armenian Christians have a special relationship to Saint Servatius (†384), the allegedly Armenian-born bishop, missionary and patron saint of Maastricht.