A profile system comprising - elongate, identically formed tile end profiles with a uniform, substantially L-shaped cross-section comprising a fastening leg for fastening to a substrate and forming a bearing surface provided with through openings, and a boundary leg adjoining the fastening leg substantially perpendicularly, wherein the boundary leg outer longitudinal side facing away from the fastening leg and the boundary leg top side form visible surfaces, the boundary leg inner longitudinal side facing towards the fastening leg forms a contact surface for the tiles and each of the boundary leg front ends forms a contact surface provided with a receiving opening for receiving a connecting element, characterized in that - at least one corner connecting piece which is configured to visually connect the boundary legs front ends of three profiles arranged perpendicular to each other for terminating installed tiles, the fastening legs of which profiles are mitred, comprising an corner connecting piece outer main side, which forms a visible surface, an corner connecting piece inner main side opposite thereto, which preferably forms a contact surface for the tiles, two adjacently arranged corner connecting piece front ends (20, 21), each of which forms a contact surface provided with a receiving recess for receiving a connecting element, and two further corner connecting piece front ends (22, 23) forming visible edges, wherein the contours of the corner connecting piece outer main side, the contours of the corner connecting piece front ends (22, 23) forming the visible surfaces and the contour of the corner area connecting these corner connecting piece front ends (22, 23) and the corner connecting piece main side to each other are adapted to the respective contours of the boundary leg outer longitudinal sides and the boundary legs top sides of the three profiles for terminating installed tiles connected to each other via a corner connecting piece such that the profiles are mutually aligned in a flush manner when installed, and - at least two connecting elements designed in the form of a pin, which are configured so that one exposed end is inserted into the receiving opening of a tile end and the other exposed end is inserted into the receiving recess of a corner connecting piece. - elongate, identically formed tile end profiles with a uniform, substantially L-shaped cross-section comprising a fastening leg for fastening to a substrate and forming a bearing surface provided with through openings, and a boundary leg adjoining the fastening leg substantially perpendicularly, wherein the boundary leg outer longitudinal side facing away from the fastening leg and the boundary leg top side form visible surfaces, the boundary leg inner longitudinal side facing towards the fastening leg forms a contact surface for the tiles and each of the boundary leg front ends forms a contact surface provided with a receiving opening for receiving a connecting element, characterized in that - at least one corner connecting piece which is configured to visually connect the boundary legs front ends of three profiles arranged perpendicular to each other for terminating installed tiles, the fastening legs of which profiles are mitred, comprising an corner connecting piece outer main side, which forms a visible surface, an corner connecting piece inner main side opposite thereto, which preferably forms a contact surface for the tiles, two adjacently arranged corner connecting piece front ends (20, 21), each of which forms a contact surface provided with a receiving recess for receiving a connecting element, and two further corner connecting piece front ends (22, 23) forming visible edges, wherein the contours of the corner connecting piece outer main side, the contours of the corner connecting piece front ends (22, 23) forming the visible surfaces and the contour of the corner area connecting these corner connecting piece front ends (22, 23) and the corner connecting piece main side to each other are adapted to the respective contours of the boundary leg outer longitudinal sides and the boundary legs top sides of the three profiles for terminating installed tiles connected to each other via a corner connecting piece such that the profiles are mutually aligned in a flush manner when installed, and - at least two connecting elements designed in the form of a pin, which are configured so that one exposed end is inserted into the receiving opening of a tile end and the other exposed end is inserted into the receiving recess of a corner connecting piece.