Luxembourg City, the capital of the Grand Duchy of Luxembourg, is a vibrant and picturesque city that serves as the heart of one of Europe's smallest sovereign states. Known for its well-preserved medieval old town perched atop sheer cliffs, the city is a harmonious blend of historical architecture and contemporary design. The fortress city, once known as the 'Gibraltar of the North', is now a UNESCO World Heritage site and is famed for its extensive casemates, a network of underground tunnels carved out of solid rock. Luxembourg City is also a prominent financial center, hosting numerous European Union institutions, banks, and international companies. The city's cosmopolitan atmosphere is enriched by its diverse population, with a significant portion of residents being expatriates. Cultural offerings abound, including museums, art galleries, and theaters, as well as a dynamic culinary scene that reflects its multicultural makeup. Green spaces such as the Pétrusse Valley and the city's numerous parks provide residents and visitors with a respite from urban life. Despite its small size, Luxembourg City is well-connected, with an efficient public transportation system and is just a short drive away from neighboring countries like France, Germany, and Belgium.