sentences:  During that visit, he was invited to design a pedestrian bridge in Petah Tikva, which was opened in 2005.He was invited to Jerusalem by city engineer Uri Shetrit and former mayor Ehud Olmert, who, according to Calatrava, challenged him to "do the most beautiful contemporary bridge".Construction of the Chords Bridge began in 2005, with an estimated cost of NIS 129 million, far higher than the initial forecast of NIS 80 million.