He also collaborated with Wren on the look of St Paul's Cathedral; Hooke identified the ideal shape of an arch is an inverted catenary and thence that a round series of these kinds of arches will make a great form to the cathedral's dome.[109] ویکی‌پدیا® علامتی تجاری متعلق به سازمان غیرانتفاعی بنی�