Ein Fundament für Hamburgs Sterne.

A foundation for the stars of Hamburg The Planetarium Hamburg was re-opened in the spring of 2017 after a building period of c. 18 months. Comprehensive reconstruction and extension works were carried out in this time with the objective of modernisation including creation of new spaces and usage possibilities. This was a challenge in particular for reasons of conservation, because the planetarium is housed in a historic former water tower in Hamburg's Stadtpark. Components of the planning task included among other things demolition and reconstruction works, retaining works for load-bearing elements subject to conservation protection and with very high fitness-for-purpose requirements, and construction of an annex while preserving the visual appearance of the water tower. These concerned equally the building planners, structural engineers and construction firms involved. The results are impressive and have been received positively from all sides, not only from the building owners and those involved in the planning, but also from the public. [ABSTRACT FROM AUTHOR]