To understand a European city must begin with the main church in the center of the city. Once again, Notre Dame in Strasbourg shocked me. The mix of Roman and Gothic styles started construction in 1015 and went through four centuries of completion. It was the world's largest building in 227 years, and it is still the sixth highest Church in the world. The church also has the world's largest astronomical clock, full of gold-plated decorations, a change in the French church interior decoration style, but also from the other hand, showing the city's people's high-quality living standards, such a beautiful church is no wonder Uncle Hugo called him "great and delicate miracle"