JW D
Google
Adding to what I wrote earlier, Google may wish to consult its Panamanian colleagues and revise this post on its map -- the walking directions do not apply. The streets closest to the Palacio are cordoned off to the public, as it is not only the historic, but also still the current residence of the president. 4 different police/security guards confirmed this to me and kindly directed me to pedestrian detours.
It's your turn now to verify, Google. Best of luck.