I had a book called Heroic: Concrete Architecture and the New Boston. I very much enjoyed perusing this book and reading up on concrete buildings. I figured out that the building featured on the cover is the Boston University law school. Then, I decided to sketch it.  On the bridge, I sat, perhaps, for two hours to accurately capture the correct proportions of the building. After, I illustrated it further at home. It was a productive time to discover Boston’s heroic buildings!