Door comprising a door leaf movable along a path predefined by an guide rail arrangement between a closed position, in which it is arranged in an approximately vertical plane, and an open position, in which it is arranged overhead in an approximately horizontal plane, which door leaf has a plurality of door leaf members arranged one behind the other in the direction of movement of the door leaf and connected to each other in an articulated manner relative to axes of articulation running perpendicular to the predefined path, wherein the guide rail arrangement has two guide rails arranged in the area of the lateral edges of the door leaf running parallel to the predefined path, each of which has: a first section running approximately parallel to a lateral edge of the door leaf in the closed position and extending substantially rectilinearly in the approximate direction of gravity, a second section running approximately parallel to a lateral edge of the door leaf in the open position and extending substantially rectilinearly, and an arcuate section connecting the rectilinear sections to each other and with a radius of curvature, on an inner guide surface thereof, of at least 400 mm, preferably at least 420 mm, more preferably at least 450 mm and in particular at least 500 mm, wherein the guide rail arrangement has additional rails interacting with forwardmost guide means arranged close to the edge, which is the forwardmost edge during the opening movement, of the door leaf member, which is the forwardmost member during the opening movement, which additional rails have a third rectilinear section located above, and running approximately parallel to, the second rectilinear section, characterized in that an edge which is the lowermost edge of the door leaf in the closed position and trails during lifting can be lifted separately, at least when the door reaches the open position, in a direction of lifting with respect to a door leaf member arranged thereabove in the closed position and with respect to the predefined path, by swivelling a lower door leaf member having said edge, wherein preferably a limiting device is provided for limiting the swivelling movement of the lower door leaf member in the direction of lifting, at least along a section of the predefined path. the guide rail arrangement has two guide rails arranged in the area of the lateral edges of the door leaf running parallel to the predefined path, each of which has: a first section running approximately parallel to a lateral edge of the door leaf in the closed position and extending substantially rectilinearly in the approximate direction of gravity, a second section running approximately parallel to a lateral edge of the door leaf in the open position and extending substantially rectilinearly, and an arcuate section connecting the rectilinear sections to each other and with a radius of curvature, on an inner guide surface thereof, of at least 400 mm, preferably at least 420 mm, more preferably at least 450 mm and in particular at least 500 mm, wherein the guide rail arrangement has additional rails interacting with forwardmost guide means arranged close to the edge, which is the forwardmost edge during the opening movement, of the door leaf member, which is the forwardmost member during the opening movement, which additional rails have a third rectilinear section located above, and running approximately parallel to, the second rectilinear section, characterized in that an edge which is the lowermost edge of the door leaf in the closed position and trails during lifting can be lifted separately, at least when the door reaches the open position, in a direction of lifting with respect to a door leaf member arranged thereabove in the closed position and with respect to the predefined path, by swivelling a lower door leaf member having said edge, wherein preferably a limiting device is provided for limiting the swivelling movement of the lower door leaf member in the direction of lifting, at least along a section of the predefined path.