Heerlen is a city and a municipality in the southeastern Netherlands The municipality is the second largest in the province of Limburg. It forms part of Parkstad Limburg,, an agglomeration of about 220,000 inhabitants. After its early Roman beginnings and a rather modest medieval period, Heerlen became a centre for the coal mining industry in the Netherlands in the late 19th century. In the 20th century, architect Frits Peutz played a major role in shaping the city as we know it today. His most famous design, and a distinctive building in the city centre, is the so-called Glaspaleis, listed as one of the world's thousand most architecturally important...more »