Now one of “The World’s 100 Most Important Places,” according to Time Magazine, it’s open for tours and nightly stargazing.

The U.S. is the biggest nuclear power in Europe, but doubts about Washington’s commitment has leaders questioning their weapons arrangements.

Half of the top 10 happiest countries in the world are in the EU. Countries with small populations dominate the rankings, ...

Your guide to the most important world stories of the day Essential analysis of the stories shaping geopolitics on the continent The latest news, analysis, and data from the country each week ...