Most visits to Liechtenstein are trouble-free but you should be aware of the global risk of indiscriminate international terrorist attacks, which could be against civilian targets, including places frequented by foreigners.
Over the past few years Vaduz, the capital of Liechtenstein, has become more and more the center of the whole region, and houses not just the Parliament but has been the residence of the Prince since 1938. Vaduz was first mentioned in documents in 1150.
Liechtenstein is the smallest yet the richest (by measure of GDP per capita) German-speaking country in the world and the only country to lie entirely within the Alps.