With its eight lanes for train, horse-drawn and automobile traffic, it was designed to be a muscle, a working horse, a purely utilitarian structure. However, it caught the attention of the City Beautiful movement, and the Carrère & Hastings architectural firm was engaged to beautify the approaches to the bridge on both sides.Carrère & Hastings introduced its design in the Beaux-Arts style in 1910 and the plan was not only approved, but also lauded as the most artistic treatment of a bridge entrance attempted on this continent. The Manhattan end of the bridge featured a Beaux-Arts plaza with its signature arch and colonnade. The arch was modeled after Porte St. Denis in Paris, and the colonnade after Bernini's famous colonnade that encircles St. Peter`s Square in the Vatican.Arches were very popular in those days. The Manhattan Bridge arch is one of only three remaining in the city now (the other two are the Soldiers` and Sailors` Arch on Grand Army Plaza in Brooklyn and the Washington Square Arch in Manhattan.)