content: Not sure I would entirely blame you (from the wiki):  Construction began on June 26, 2005, with an estimated cost of 50 million euros and a projected completion date in June 2007. However, unknown to the public, the project soon faced difficulties. By May 2007 engineering firm Arup informed the municipal authorities that the structure was technically infeasible as designed, given that a number of structural assumptions had not been tested and the design appeared to violate the limitations of known materials. The wood used was birch, imported from Finland, because of its straight qualities.  Much time was spent developing feasible alternative plans to buttress the structure, which themselves proved impractical because of the added weight. A feasible design using glue as reinforcement was finally settled on only at the beginning of 2009