This Dutch city was best known for ruined castles until the 1991 European Union Treaty was signed there
The land now known as Luxembourg fell under the successive 
domination of the ... a treaty of economic union, which became effective in 1960, 
was signed by... [DOC] [TLE] Timeline of Maastricht - Revolvy [PAR] The following is a timeline of the history of the city of Maastricht , Netherlands .