The Holy Trinity, with the Virgin and Saint John and donors is a fresco

Fresco

Fresco is any of several related mural painting types, executed on plaster on walls or ceilings. The word fresco comes from the Greek word affresca which derives from the Latin word for "fresh". Frescoes first developed in the ancient world and continued to be popular through the Renaissance...

 by the Early Italian Renaissance

Italian Renaissance

The Italian Renaissance began the opening phase of the Renaissance, a period of great cultural change and achievement in Europe that spanned the period from the end of the 13th century to about 1600, marking the transition between Medieval and Early Modern Europe...

 painter Masaccio

Masaccio

Masaccio , born Tommaso di Ser Giovanni di Simone, was the first great painter of the Quattrocento period of the Italian Renaissance. According to Vasari, Masaccio was the best painter of his generation because of his skill at recreating lifelike figures and movements as well as a convincing sense...

. It is located in the Dominican church of Santa Maria Novella, in Florence

Florence

Florence is the capital city of the Italian region of Tuscany and of the province of Florence. It is the most populous city in Tuscany, with approximately 370,000 inhabitants, expanding to over 1.5 million in the metropolitan area....

.
When it was executed, no actual coffered barrel vault

Barrel vault

A barrel vault, also known as a tunnel vault or a wagon vault, is an architectural element formed by the extrusion of a single curve along a given distance. The curves are typically circular in shape, lending a semi-cylindrical appearance to the total design...

 had yet been constructed since the Romans.

The Trinity is noteworthy for its inspiration taken from ancient Roman triumphal arch

Triumphal arch

A triumphal arch is a monumental structure in the shape of an archway with one or more arched passageways, often designed to span a road. In its simplest form a triumphal arch consists of two massive piers connected by an arch, crowned with a flat entablature or attic on which a statue might be...

es and the strict adherence to the recent perspective discoveries, with a vanishing point

Vanishing point

A vanishing point is a point in a perspective drawing to which parallel lines not parallel to the image plane appear to converge. The number and placement of the vanishing points determines which perspective technique is being used...

 at the viewer's eye level, so that, as Vasari describes it "a barrel vault drawn in perspective, and divided into squares with rosettes that diminish and are foreshortened so well that there seems to be a hole in the wall." This artistic technique is called trompe l'oeil

Trompe l'oeil

Trompe-l'œil, which can also be spelled without the hyphen in English as trompe l'oeil, is an art technique involving extremely realistic imagery in order to create the optical illusion that the depicted objects appear in three dimensions.-History in painting:Although the phrase has its origin in...

, which means "deceives the eye," in French.