Journalist and author Jane Jacobs wrote about Paul Philippe Cret's additions to the park that remain there today. Rittenhouse Square has changed the least out of the Squares. Vacant lots were converted to apartments and hotels, and original mansions were replaced with apartments such as Claridge and Savoy. Jacobs focused on sharing two main ideas in Paul Cret's redesign, intricacy and centering. Compared with the other four original squares in Philadelphia, Rittenhouse Square has survived proposed alterations that may have changed both its physical layout and character.