REMOVE

1. Arches
2. Signs and signboards

WHAT

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

WHERE

1. BELGIUM (9)
2. Liège, Liège (9)
3. ENGLAND, UK (1)
4. Sheffield, South Yorkshir … (1)

WHO

1. CALATRAVA, Santiago (9)
2. not known (1)

WHEN

1. 2009 (9)
2. 1989 (1)