The design builds on the principles of the master plan while refining key spatial and functional aspects to create a more coherent, accessible, and integrated environment. At the southeast corner, the building volume is extended at a high level to complete the urban edge, forming a defined corner while enhancing the entrance through the addition of a pergola. Accessibility is improved by lowering the main entrance level by one floor, replacing the steep 12-meter ascent with a more gradual, two-part staircase that leads to an inviting outdoor arrival space after just 7 meters. This clear entry point seamlessly connects interior and exterior through a lively, light-filled hall, creating an intuitive orientation within the complex.

The ISTA platform continues to link the buildings but is reinterpreted as a generous open space for recreation and social interaction rather than a primary circulation level. The base structure is reduced in height to strengthen visual connections across the site and establish a more natural, layered relationship with the landscape. This approach is reinforced by the open space concept, which draws the surrounding Vienna Woods landscape into the site and creates a dialogue between soft, flowing natural forms and the project’s clear, linear architecture.

A network of paths and circulation routes connects all levels, encouraging movement, interaction, and informal exchange while providing spaces for relaxation and study. The central landscape staircase links the lower access levels with public transport and barrier-free entry, the main entrance, and the platform, while additional paths connect to the existing campus, residential areas, and the nearby museum. Greenery flows through the site from east to west, shaping terraces, stair landings, and the platform into vibrant gathering spaces with a pleasant microclimate. Native planting, blooming meadows, and characteristic tree species integrate the architecture seamlessly into its surroundings.

The design balances natural and built elements. In the southern areas, gently modeled terrain and organic planting dominate, while the landscape staircase introduces more defined stone structures that create dynamic spaces for gathering and views. Green islands, wooden decks, and climbing plants soften the architecture and connect it to the pergola structure, which unifies the open spaces by providing orientation, spatial framing, shading, and the integration of photovoltaic elements.

The façade responds to diverse functional requirements with a clear horizontal articulation that ensures a cohesive appearance despite varying building heights. Embossed metal panels in warm, subtly shifting tones give the ensemble a distinctive identity that balances technological expression with the surrounding natural context.

Inside, the buildings are organized to support both focused work and communication. Flexible, highly functional central areas are complemented by more open zones at the building edges, offering views and spaces for interaction. Connections between buildings are carefully integrated to ensure efficient movement, while outdoor areas extend the work environment into the landscape, fostering a dynamic and collaborative atmosphere. The structural concept follows principles of efficiency and flexibility, using a reinforced concrete system with point-supported slabs, load-bearing walls, and bracing cores to ensure stability. Flat slab construction allows adaptable layouts and seamless integration of building services, while selected areas incorporate timber or hybrid timber construction to enhance sustainability. Below ground, structural elements are optimized to avoid unnecessary supports, and robust waterproofing and retaining systems ensure long-term durability within the sloped terrain.