Luxembourg is a small constitutional monarchy, having a civil law system based on that of Switzerland and Austria. Nestled between France, Germany and Belgium, Luxembourg is a country with a great deal to offer. An independent country with a population of around 524,853 (2012 estimate), Luxembourg has an abundance of history, greenery and culture. The country is 84 kilometres long and 52 kilometres wide, and it is one of the smallest sovereign states in Europe. Approximately 25% of Luxembourg's exports are steel which accounts for a staggering 10% of the total worldwide exportation of steel. However, in the past decade, the finance and banking sector has emerged as a key driver of the economy, shadowing steel production and exportation. Luxembourg boasts the second largest investment funds industry in the world (number one being the USA), the eighth largest financial centre in general and a premier private banking centre in the Eurozone. With the reputation as a tax haven, Luxembourg is a magnet for banks, insurance companies, foreign investors and specialist service providers globally. By providing a pro-business environment with a robust regulatory framework, stable socio-political environment, strong economy and business-friendly policies, Luxembourg has become an international financial centre hosting various types of financial institutions. Apart from that, Luxembourg is steeped in a rich cultural and historical heritage, with numerous medieval castles, vestiges of First World War and Roman forts and underground passages which are now UNESCO sites.