Minimalist logo design for real estate company "Les Clés de la Loire", featuring iconic Blois landmarks: authentic French Renaissance Chateau de Blois with distinctive facade and curved roofs, Jacques Gabriel Bridge with elevated central arch spanning over stylized flowing Loire river, gothic Cathedral Saint-Louis silhouette, vintage ornate keys intertwined in the design, elegant black lines on white background, clean geometric shapes, architectural drawing style, thin line art with refined details, professional luxury real estate branding --ar 3:2 --style raw