Read this: The area surrounding Utrecht Centraal railway station and the station itself were developed following modernist ideas of the 1960s, in a brutalist style. This led to the construction of the shopping mall Hoog Catharijne (nl), music centre Vredenburg (Hertzberger, 1979), and conversion of part of the ancient canal structure into a highway (Catherijnebaan). Protest against further modernisation of the city centre followed even before the last buildings were finalised. In the early 21st century the whole area is being redeveloped. The music redeveloped music centre opened in 2014 where the original Vredenburg concert and rock and jazz halls are brought together in a single building.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): What mall was built over part of the old canal system?
unanswerable