Many of the Pilgrims who migrated to the Plymouth Plantation had resided in the city of Leiden from 1609–1620, many of whom had recorded their births, marriages and deaths at the Pieterskerk. To commemorate this, a non-denominational Thanksgiving Day service is held each year on the morning of the American Thanksgiving Day in the Pieterskerk, a Gothic church in Leiden, to commemorate the hospitality the Pilgrims received in Leiden on their way to the New World.