The City of The Hague has canceled the M Building by Rem Koolhaas just after they hade broke ground in front of the The Hague Central Train Station and had spend roughly € 2 mio planning costs.
I would say better stop here than completing it in error. In the present economic circumstances it is uncertain whether such mega (some would say magalomanic) building could be filled with paying tenants. The City of The Hague had guaranteed to rent a substantial part of it , so there is a huge saving post gained.
Off course it is a loss that we will miss a building of one of the most foremost architects we have in The Netherlands and even will lose one when the Dutch Dance Theater that was designed by Rem Koolhaas will be replaced by a new building.