Hilton Worldwide will add nine new hotels to its Polish chain, having just opened its DoubleTree by Hilton in the city of Wrocław. The new hotel is the fourth DoubleTree by Hilton in Poland its 73rd hotel in Europe. DoubleTree by Hilton is one of the group’s 13 brands. Hilton’s chain in Poland amounts to 14 hotels. Before this latest opening, the company announced its plans to develop another two Hamptons by Hilton in Gdańsk and Lublin.