The 9 April Garden, also known as Albertas, has a belvedere with a panoramic views to the Tagus River and it is surrounded by numerous buildings of historical significance to Lisbon. This space appears as a promontory in a green space filled with tradition, open to the river and shipping, and with stunning views to the imposing right bank of river Tagus Placed on the roofscape of an existing building which anchors the level change between the garden and the lower plane of the Avenida 24 de Julho, this bar/terrace is built on as single storey structure. Its ephemeral character, lightness of materials, transparency, permeability and reflection promotes and preserves existing views, allowing the structure not to become an obstacle.