Architecture
- Radon-Statusgespräch des BMU
- Rail Bridge Centenary Conference
- Railway Engineers Forum
- Rand Graduate School Commencement Exercises
- Raumplanungsseminar
- Ravel-Tagung
- Ravel-Tagung, Journée Ravel
- RCL Interforum - Internationales Baustoff-Recycling-Forum
- Rádioelektronika
- REAL CORP
- Recovery, Recycling, Re-Integration International Congress (R
- Re-Cycle Italy Seminar/Workshop
- Referat af det Nordiske Geodaetmode
- Regional Conference on Tall Buildings
- Regionales Photochemiker-Treffen
- Regionalʹnyj Mežvuzovskij Seminar Processy Teploobmena v Ėnergomašinostroenii
- Regionalʹnyj Naučno-Techničeskij Seminar po Statističeskomu Analizu, Modelirovaniju i Avtomatizacii Kontrolja Ob-ektov s Konstruktivno Složnoj Strukturoj
- Regionalʹnyj Seminar
- Regionalplanertagung
- Regionalplanertagung Baden-Württemberg
- Regional Planning Conference
- Regional Studies Association conference
- Relay Conference
- Remote Sensing Technologies and Applications in Urban Environments
- Rencontre Nationale des Agences d'Urbanisme
- Rencontres. Comité Français des Géotextiles et Géomembranes
- Rencontres Internationales
- REPSI
- Research conference
- Rettungskongress des Deutschen Roten Kreuzes
- Reunión sobre Problemas en Semillas Forestales Tropicales
- ReUSO
- Revitalising moderately old urban areas
- RF Expo East
- RF Expo West
- RF Technology Expo
- RGS-IBG annual conference
- RGW-Arbeitstagung
- Rheinischer Tag für Denkmalpflege
- RHINO-Fachtagung "Das Braune Gold
- RILEM International Symposium on Bituminous Materials
- RILEM International Workshop
- RILEM seminar
- RILEM Spring Convention and Conference
- RILEM Symposium on Concrete and Reinforced Concrete in Hot Countries
- RILEM Symposium on Fibre-Reinforced Concretes
- Roads and traffic
- Robert Maillart - Beton-Virtuose
- Rosenheimer Fenstertage
- Rosenheimer Holzbautage
- Rothenburger Tagung
- Royal Fine Art Commission Seminar
- Rubber-Modified Asphalt Conference
- Réunion du Comité Consultatif International des Communications Télégraphiques
- Réunion Générale de l'Association Internationale des Hydrogéologues
- Russell-Tribunal