Question mark
The rhetorical question mark or percontation point was invented by Henry Denham in the 1580s and was used at the end of a rhetorical question; however, its use died out in the 17th century. It was later revived in modern-day society by Matt DiRoberto. It was the reverse of an ordinary question mark, so that instead of the main opening pointing back into the sentence, it opened away from it. This character can be represented using the reversed question mark (⸮) found in Unicode as U+2E2E. The percontation point is analogous to the irony mark, but those are even more rarely seen.
Mark (currency)
The mark was a currency or unit of account in many nations. It is named for the mark unit of weight. The word "mark" comes from a merging of three Teutonic/Germanic words, Latinised in 9th-century post-classical Latin as ', ', ' or '. It was a measure of weight mainly for gold and silver, commonly used throughout Western Europe and often equivalent to eight ounces. Considerable variations, however, occurred throughout the Middle Ages.