It is an extension of boutique hotel and gallery of the Hong Kong Museum of Coastal Defense, located on a North facing slope at the sea side, a heritage fortification in the past. The concept is to revitalize the heritage and create a space which adapt to the sunlight on north facing slope suitable for accommodation and exhibition. The layout is extended from the spherical radiation of the arc of fire and contour lines. It embraces the central batteries and formed a garden, preserved the best view on the slope. Fully utilize the existing logistic access on the main heritage trail to reduce footprint. Introduce natural light feature to provide appropriate lighting to guest room and gallery in different period in a day which giving the sense of time.