Final answer:
The vanishing point in a one-point linear perspective is located at the horizon line where all the receding parallel lines, known as orthogonals, converge, creating the illusion of depth.
Step-by-step explanation:
The vanishing point in a one-point linear perspective system is located on the horizon line and is the spot where all orthogonals (the diagonal lines that give the illusion of depth by receding into the distance) appear to converge.
When an object has a flat front facing the viewer, such as a building with a flat facade, the parallel lines of the sides of the building will appear to meet at the vanishing point on the horizon line.
This single vanishing point creates the illusion of depth and is one of the fundamental concepts in linear perspective.
For instance, artists during the Renaissance period like Masaccio employed this method to achieve realistic depth in their paintings, as seen in the use of straight perspective lines in the coffered ceiling of his famous work 'Trinity'.