Fortress:You Adopting a Fortress Mentality for success. It’s necessary. And here’s how. September 2016, while with the ‘insanely great’ #StartupBusUK group, we stayed on the property related to the Vianden Castle, Luxembourg, started in the 900’s. We stayed in the four-story building in the lower left of the photo. The term fortress is more of a military term but refers to basically the same type of building and concept as a castle. Large and strong, and fortified to ke