On our last visit to Tokyo, we went to Chiyoda ward and visited the Emperor's palace.

Then near the corslet, at the monarch’s heart, With all his strength, the youth directs his dart: But the broad belt, with plates of silver bound, The point rebated, and repell’d the wound.

It was the least surprising thing.

There are no one-sided closed polygons on a plane. On the cube, however, monogons are a diverse and interesting class of figures.