Château of Val-Duchesse
In 1956 , Paul Henri Spaak led the Intergovernmental Conference on the Common Market and Euratom at the château , which prepared the Treaties of Rome in 1957 and the foundation of the European Economic Community and Euratom in 1958 . 
<triplet> European Economic Community <subj> 1958 <obj> inception <triplet> Euratom <subj> 1958 <obj> start time