On Palm Sunday, 30 March 1890, five young collectors, Joseph Schock, J. Faber, Jean-Charles Kohn, Jean Hellinckx and Michel Goebel, met at the Kiffer Café in the train station district of Luxembourg-City to found a philately society, the "Union des Timbrophiles de Luxembourg", the first philately society in Luxembourg.
In 1934, the "Union des Timbrophiles de Luxembourg" was one of the four founding societies of the "Fédération des Sociétés Philatéliques" of the Grand Duchy of Luxembourg (FSPL) which celebrated its 80th anniversary in 2014.
Founded in March 1990, the OAI brings together five liberal professions, namely architects, interior architects, consulting engineers, town planners and landscapers. Collectively, they employ over 4,200 people in Luxembourg.
OAI informs about the impact of its members' work at an economic, social and cultural level.