Château of Val-Duchesse
The first formal meeting of the Hallstein Commission , the first European Commission , under the presidency of Walter Hallstein , was held on 16 January 1958 at the château . 
<triplet> Hallstein Commission <subj> European Commission <obj> instance of <triplet> presidency <subj> European Commission <obj> organization directed by the office or position <triplet> Walter Hallstein <subj> presidency <obj> position held