Create a full-page, light greyscale line art coloring page, capturing the historical essence of Olvera Street's firehouse museum. The drawing should focus on the building's vintage architecture, showcasing the intricate brickwork, the grand archways, and the charming old-world windows. The firehouse's emblem, complete with the museum's date of establishment, must be prominently placed. Include an antique fire engine on display at the entrance, accentuating its details with subtle lines. Along the street, add cobblestone paths, hanging lanterns, and blooming flower pots that reflect the area's rich cultural heritage. This page must inspire colorists to bring history to life, with clear spaces that allow for both creativity and mindfulness, and shading to guide choices for depth and texture --ar 17:22 --s 50