REMOVE

1. Arches
2. Elevators

WHAT

1. Engineering (9)
2. Architecture -- 2000-2100 (8)
3. Architecture -- Belgium (8)

WHERE

1. BELGIUM (8)
2. Liège, Liège (8)
3. FRANCE (1)
4. Paris (1)

WHO

1. CALATRAVA, Santiago (8)
2. VON SPRECKELSEN, Johan Ot … (1)

WHEN

1. 2009 (8)
2. 1990 (1)