Gian Lorenzo Bernini
It is a ciborium or monumental baldachin of 28'5 meters. It has four columns (20 meters) culminated in a canopy of forged black solid bronze and based on Baroque style, which is housed in the center of the transept of the basilica of St. Peter's Basilica, directly under the dome, in the Vatican City. It is located on the vault where the tomb of the Apostle Peter is.
St. Peter's Basilica
It has a Baroque style. The Baroque is often thought of as a period of artistic style that used exaggerated motion and clear, easily interpreted detail to produce drama, tension, exuberance, and grandeur in sculpture, painting, architecture, literature, dance, and music. The style began around 1600 in Rome, Italy and spread to most of Europe.
In 1610 was commissioned Carlo Maderno, Bernini's predecessor, was commissioned for the design of a permanent baldachin for San Peter, for which he already incorporated spiral columns. Actually the Old St. Peter's Basilica had twelve spiral columns forming a screen before the altar. Greece had brought by the Emperor Constantine in the second century from Greecce. In the Middle Ages peoples claimed that they came from the Temple of Solomon. What is certain is that they are of Greek marble. Eight of those columns are preserved inside the basilica, near the canopy.