- The Ahmanson Foundation
- The Ambassador International Cultural Foundation
- The Catholic Biblical Association
- The Cotsen Family Foundation
- The L. J. Skaggs and Mary C. Skaggs Foundation
- The National Endowment for the Humanities
- Rotary Coneglia
- Steinmetz Family
- The National Geographic Society
- The Samuel H. Kress Foundation
- San Carlos Foundation
- The World Monuments Fund