The element (20) has a crescent-shaped body (21) provided with a concave front side (21.1) and a convex back side (21.2). The concave front side is formed by a circular arc segment (KB1) of a circle, where a radius of the circle corresponds to a corner radius of a sanitary device. The convex back side comprises an apex region (21.3) and is formed or converged in the apex region by an arc segment (EB1). The element comprises a passage and a projection and exhibits a vertical expansion that is formed perpendicular to a horizontal section and amounts to 5 mm. Independent claims are also included for the following: (1) a sanitary device (2) a method for manufacture of a wall end between a sanitary device and a wall corner of a building.
