This plaque commemorates the old Quartier Isabelle of which the Rue Terarcken is a lucky survival. Charlotte and Emily Brontë would have passed this street when going to the Pensionnat Heger in the Rue d'Isabelle where they stayed in 1842-43. The memory of this area lives on in the vivid image Charlotte portrays in her novel Villette

A nice story at http://www.thebrusselsbrontegroup.org/secret%20mission.html

See also...
sgwarnog2010 on Flickr
John P Coates on Geograph
flipflopnick on Flickr
Keith Seabridge on Flickr
David Spencer on Geograph
George Tod on Geograph
Peter Hughes on Flickr
Spudgun67 on Wikimedia Commons
Spudgun67 on Wikimedia Commons
Chris Hall on Geograph
Spudgun67 on Wikimedia Commons