The refurbishment of the UNStudio Tower Lobby located in the Zuidas South Axis of Amsterdam creates a renewed environment that promotes interaction and communication. The UNStudio Tower was originally constructed in 2009, with two entrance lobbies serving the main tenants. In keeping with the evolving nature of offices on the Zuidas, the new lobby has been redesigned with a unifying layout, fitting the multi-tenant character of the building and surrounding district. Flexibility related to future changes was key in the original architectural design of the tower itself. The new design of the lobby continues this approach by creating a ‘flex-lobby’, a flexible space offering a welcoming entrance area and a space suitable for informal meetings and larger events. The design of the lobby complements the existing architecture, but through the introduction of strategic wayfinding elements, we can establish a strong new identity for the building. The Chandelier, comprised of back-lit Corian surfaces and parametrically arrayed copper tubes, guides people from outside into the lobby and towards the lift lobbies. Responsive lighting illuminates the chandelier, changing to reflect different atmospheres throughout the days and seasons of the year. As a means of activating people within the building, fluid ground planes becomes a multi-functional element, creating a smooth transition between the level changes in the lobby, transforming into bespoke furniture and seating. The materials used bring warmth and nature into the building through wood flooring, textile walls and built-in furniture pieces.