A wall attachment assembly for securing a handrail to a supporting wall, the handrail having a first end and a second end, the attachment assembly comprising: a hollow connection piece (160;612) for engaging one of the first and second ends of the handrail, the connection piece including an inner connecting member (174;654) extending radially inwardly; a wall attachment device (100, 900, 1400, 1600) for connecting the connection piece to the supporting wall, the wall attachment device including: a body (200, 902, 1402, 1602) sized and shaped to be received in the connection piece (160;612), the body including a planar rear face adapted to be positioned against the supporting wall, a front face opposite the rear face and a lateral face, the body further having at least one fastener opening (250a-e, 950a-e, 1450a-d, 1750a-d) extending between the front and rear faces, each fastener opening being adapted to receive a fastener for securing the body to the supporting wall; and an outer connecting member extending radially outwardly from the lateral face for securely engaging the inner connecting member of the connection piece to thereby attach the corresponding one of the first and second ends of the handrail to the supporting wall, wherein the hollow connection piece (160;612) includes a first half portion (162;664) and a second half portion (164;666) adapted to be secured together for engaging the corresponding one of the first and second ends of the handrail, the inner connecting member (174;654) extending radially inwardly from at least one of the first and second half portions, and the connection piece (160, 612) lockably engages the corresponding one of the first and second ends of the handrail and the wall attachment device (100, 900, 1400, 1600) and secures the wall attachment device (100, 900, 1400, 1600) to the corresponding one of the first and second ends of the handrail. a hollow connection piece (160;612) for engaging one of the first and second ends of the handrail, the connection piece including an inner connecting member (174;654) extending radially inwardly; a wall attachment device (100, 900, 1400, 1600) for connecting the connection piece to the supporting wall, the wall attachment device including: a body (200, 902, 1402, 1602) sized and shaped to be received in the connection piece (160;612), the body including a planar rear face adapted to be positioned against the supporting wall, a front face opposite the rear face and a lateral face, the body further having at least one fastener opening (250a-e, 950a-e, 1450a-d, 1750a-d) extending between the front and rear faces, each fastener opening being adapted to receive a fastener for securing the body to the supporting wall; and an outer connecting member extending radially outwardly from the lateral face for securely engaging the inner connecting member of the connection piece to thereby attach the corresponding one of the first and second ends of the handrail to the supporting wall, wherein the hollow connection piece (160;612) includes a first half portion (162;664) and a second half portion (164;666) adapted to be secured together for engaging the corresponding one of the first and second ends of the handrail, the inner connecting member (174;654) extending radially inwardly from at least one of the first and second half portions, and the connection piece (160, 612) lockably engages the corresponding one of the first and second ends of the handrail and the wall attachment device (100, 900, 1400, 1600) and secures the wall attachment device (100, 900, 1400, 1600) to the corresponding one of the first and second ends of the handrail. a body (200, 902, 1402, 1602) sized and shaped to be received in the connection piece (160;612), the body including a planar rear face adapted to be positioned against the supporting wall, a front face opposite the rear face and a lateral face, the body further having at least one fastener opening (250a-e, 950a-e, 1450a-d, 1750a-d) extending between the front and rear faces, each fastener opening being adapted to receive a fastener for securing the body to the supporting wall; and an outer connecting member extending radially outwardly from the lateral face for securely engaging the inner connecting member of the connection piece to thereby attach the corresponding one of the first and second ends of the handrail to the supporting wall, wherein the hollow connection piece (160;612) includes a first half portion (162;664) and a second half portion (164;666) adapted to be secured together for engaging the corresponding one of the first and second ends of the handrail, the inner connecting member (174;654) extending radially inwardly from at least one of the first and second half portions, and the connection piece (160, 612) lockably engages the corresponding one of the first and second ends of the handrail and the wall attachment device (100, 900, 1400, 1600) and secures the wall attachment device (100, 900, 1400, 1600) to the corresponding one of the first and second ends of the handrail.