Preservation Alumni   brings together members from around the world and from diverse professional fields, united by our love of buildings and places, and our interest in their future. We are the oldest and  largest preservation alumni association in the United States, and collectively our members have helped preserve many of the country's most important monuments and sites. We organize regular social, educational, and volunteer activities, and we strive to support the mission of the Historic Preservation program at Columbia University. We encourage you to become a member and to take an active interest in the built environment that surrounds you.