On my official trip to Brussels from the USA in Oct 2002 I was booked in a hotel in the Grand Place area. I just decided to stroll and I couldn't believe what I was seeing when I entered the Grand Place square. It was late in the evening and the square and the guild houses were lit. The effect it had was magical! The critical mass of the Italian Baroque blend of architecture completely transformed me. It was as if I did a time travel to earlier centuries. All this experience is free! I highly recommend this place especially when it is lit!
The disappointing thing is that I tried to find the explanation and the architectural details of each guild house in the Grand Place on the internet in English and couldn't find any.