The Quartier du Châtelain district is an architectural treasure worth finding, far from Brussels’ tourist-packed city center. On this walking tour through the quaint neighborhood’s streets, you’ll see the revolutionary Art Nouveau style that emerged here in the 1890s, transforming the cityscape with buildings that curved and twisted like exotic plants. Starting at the Louise Tower, you’ll weave your way past several of these exceptionally designed dwellings. As a journalist who’s lived in Brussels for 35 years and author of *The 500 Hidden Secrets of Brussels*, I’ll guide you to Art Nouveau gems that even locals sometimes overlook. You’ll see the over 100-year-old Maison Hankar and Hôtel Tassel, the world’s first Art Nouveau house. You’ll also discover how Brussels has meticulously restored architectural masterpieces like the stunning Maison Roosenboom, where you’ll see an example of a sgraffito mural. As you make your way to Musée Horta, which celebrates the famous architect, I’ll share the little-known history of the city’s townhouses. You’ll pass one of Chaussée de Charleroi’s tram shelters and hear about attempts to brand Brussels ‘the capital of Art Nouveau’ en route to Hôtel Solvay, where the tour ends. Along the way, you’ll have a chance to: • Explore the spectacular La Patinoire Royale, an abandoned car showroom turned art gallery • Learn about Paul Otlet’s proto-internet invention from the 1900s at Hôtel Otlet, where the father of information science once lived • Discover the historical connection between Brussels and Paris metro stations • Pop into contemporary art spaces like Stream Art Gallery and Hangar Art Center • Visit Europe’s oldest roller skating rink • Enjoy refreshments at charming local spots like Jat’ Café, Jackie, Hinterland, the Portuguese cake shop Forcado Pastelaria, and the sophisticated Oeno TK wine bar • Find out how locals used to clean their boots By the end of this 90-minute walk, you’ll understand why Brussels ranks among Europe’s most fascinating architectural destinations. There are plenty of opportunities for coffee breaks, Belgian beers, or relaxed meals in local establishments along the way.