Landstrae, Viennas 3rd district, contains the citys so-called diplomatic quarter, which retains a rich vein of Viennese imperial charm with its churches, monuments, upmarket hotels, fancy restaurants and palaces, including the striking Belvedere Palace, a showpiece of early 18th century rococo architecture. Most of the district, however, is home to Viennas lower income and minority groups, mainly from eastern Europe and the Balkans, which have boosted the population in recent years. Landstrae also has the most shops, industrial enterprises and businesses (many of them insurance companies) of any Viennese district except the city centre (Innere Stadt) and has witnessed a building boom in recent years. Situated to the south-east of downtown and hemmed in on the east by the Danube Canal Landstrae also contains the KunstHausWien designed by Hundertwasser, the rustic Stadtpark, the Wien Mitte railway station and the city air terminal. The S7 and S60 suburban trains criss-cross Landstrae while the U3 underground links it to the city centre.