This research project examines the feasibility of developing a functional multi-storey timber building in the Mediteranean. The climatic conditions of this region pose considerable challenges for the thermal performance of a building, especially the high temperatures in the summer. The central research question thus is how the thermal performance of a multi-storey timber building under Mediterranean climate conditions can be optimized? For the optimization of the thermal performance of the wood based building project (a multi-storey hotel building located in Barcelona), this research project will rely exlufively on two differen bioclimate architectural techniques: the design of the buildings geometric shape and the design of the façade. To identify interesting ideas for façade solutins, this research project seeks to learn from the past and engages in a study of traditional Spanish architecture. In so doing, the concept of a double layer façade system (used in traditional wooden alleries, the so-called Solanas) is identified as a very useful design solution to improve the thermal performance of a wooden based building in hot weather conditions. The idea is then adaped to the purposes of the wood bases hotel building project. A comparison with other construction materials shows, that by using a double layer façade system, the disadvantages wood has in terms of storage mass over alternative construction amterials like concrete can me largely offset. As far as the geometric shape and orientation of the wood based hotel building is concerned, an oval shape with an internal courtyard has been selected as these characteristics satisfy the requirement of an exceptional thermal performance as well as oter important design criteria.