| Autor | Títulos | | 1.
| International Catholic Migration Congress, The Hague, 1954 | 1 | | 2.
| International Catholic Migration Foundation | 1 | | 3.
| International Center for Contemporary Art (Tacoma, Estados Unidos) | 0 | | 4.
| Ver: Museum of Glass. International Center for Contemporary Art (Tacoma, Estados Unidos) | 1 | | 5.
| International Center for Mathematics (Coimbra, Portugal) | 1 | | 6.
| International Center of Photography (Nova Iorque, Estados Unidos) | 30 | | 7.
| International Centre for the study of the preservation and the restoration of cultural property | 1 | | 8.
| International Centre of Graphic Arts (Lubiliana, Eslovénia) | 2 | | 9.
| The International College of Languages, Londres | 1 | | 10.
| International Colloquium on Ancient Mosaics, 5o, Bath, 1987 | 1 | | 11.
| International Colloquium on Luso-Brazilian Studies, Washington, October 15-20, 1950 | 1 |
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