A tiled display comprising: a first display device and a second display device, disposed adjacent to each other, the first device comprising a first display area and the second display device comprising a second display area, the first and the second display areas each having light-emitting areas, and a seam between the first display area and the second display area, wherein the first display device comprises: a first base part in the first display area; a first support layer on the first base part in the first display area and the seam; and a display layer on the first support layer in the first display area and the seam, and wherein the second display device comprises: a first base part in the second display area; a first support layer on the first base part in the second display area and the seam; and a display layer on the first support layer in the second display area and the seam wherein the display layer comprises a thin-film transistor layer (TFTL) comprising a plurality of thin-film transistors and a light emitting element layer on the thin-film transistor layer (TFTL) and comprising a plurality of light-emitting elements, and the display layer of the first display device overlaps the display layer of the second display device in a thickness direction in the seam area. a first display device and a second display device, disposed adjacent to each other, the first device comprising a first display area and the second display device comprising a second display area, the first and the second display areas each having light-emitting areas, and a seam between the first display area and the second display area, wherein the first display device comprises: a first base part in the first display area; a first support layer on the first base part in the first display area and the seam; and a display layer on the first support layer in the first display area and the seam, and a first base part in the first display area; a first support layer on the first base part in the first display area and the seam; and a display layer on the first support layer in the first display area and the seam, and wherein the second display device comprises: a first base part in the second display area; a first support layer on the first base part in the second display area a first base part in the second display area; a first support layer on the first base part in the second display area and the seam; and a display layer on the first support layer in the second display area and the seam wherein the display layer comprises a thin-film transistor layer (TFTL) comprising a plurality of thin-film transistors and a light emitting element layer on the thin-film transistor layer (TFTL) and comprising a plurality of light-emitting elements, and the display layer of the first display device overlaps the display layer of the second display device in a thickness direction in the seam area. a display layer on the first support layer in the second display area and the seam wherein the display layer comprises a thin-film transistor layer (TFTL) comprising a plurality of thin-film transistors and a light emitting element layer on the thin-film transistor layer (TFTL) and comprising a plurality of light-emitting elements, and the display layer of the first display device overlaps the display layer of the second display device in a thickness direction in the seam area. the display layer comprises a thin-film transistor layer (TFTL) comprising a plurality of thin-film transistors and a light emitting element layer on the thin-film transistor layer (TFTL) and comprising a plurality of light-emitting elements, and the display layer of the first display device overlaps the display layer of the second display device in a thickness direction in the seam area.