Toledo, [96], [144], [259], [288].

Trace and projection, [21].

Transposed distance, [53].

Triangles, [104], [106], [132], [135], [138].

Turner, [2], [87].

U

Ubaldus, Guidus, [9].

V

Vanishing lines, [49].

Vani"hing point, [119].