During the industrial revolution in Catalunya, the business man Eusebi Güell asked the modernist architect Antoni Gaudi to build an company town around one of his factories. This is how the “Colònia Güell” was built. You can visit the entire town for free, it is not far from Barcelona and it is totally worth. You should checkout the museum, the school, the doctor’s house, the town hall and, of course the impressive church. Here you have one of its stained glass windows: