What is the approximate height of each travertine column in the colonnades designed by Bernini?

The travertine columns in the colonnades designed by Gian Lorenzo Bernini at St. Peter's Square in Vatican City are approximately 39 feet high. This architectural design was intended to create a sense of grandeur and harmony within the expansive space of the square, symbolizing the open arms of the Church welcoming visitors. The columns, arranged in a sweeping curve, also serve to visually draw people towards the basilica itself, enhancing the overall experience of entering this significant religious location. The specific height of 39 feet allows the colonnades to maintain a monumental presence while complementing the vastness of St. Peter's Basilica, aligning with the Baroque emphasis on dramatic effects and grandeur.