I love the architecture with the exposed trusses. The flag is unusually beautiful hung among them.
That building was the “Old Post Office.” Over the years DC tried to do various things to make it a successful venture, but to no avail. For a period they had a New Year’s Eve “Stamp Drop” similar to NYC’s (then) Apple Drop at midnight. That ended after about two years when there were knifings and other more minor crimes at the event.
Along came Trump & Co., who entered into an agreement with the DC government and refurbished it as a first class hotel. Conveniently located @ 3 blocks from the White House