Designed to be a first class venue for symphonic music, the Lotte Concert Hall is arranged as a surround hall, with 2,000 seats encircling a generous stage sized for a full-size orchestra and chorus. The concert hall, designed with dmp Architects, sits atop six mixed-use floors in a supertower designed by KPF Architects that contains offices, a hotel, residential units, retail, and other amenities. A major symphony hall integrated into a thriving mixed-use tower, Lotte Concert Hall is the first of its kind in Seoul, and will bring top-tier cultural events into the mix of activities residents and visitors expect from their experience in such a building. The design of the room features motorized orchestral riser stage lifts, automated lighting battens for theatrical lighting, deployable film screens and projectors, motorized variable acoustics banners, and extensive back-of-house support for visiting orchestras and artists. Lotte World Tower is a 123-floor, 556-meter skyscraper in the second-generation Lotte World complex in Seoul, South Korea. It is one of the tallest skyscrapers in the world, surpassing One World Trade Center in New York City and housing the tallest observation deck in the world on its 123rd floor at 497.6 meters.