What is the circumference of a pitcher's mound?

There have been several requests recently about this topic...and for the record....building a mound has several options and this is just one. First a bit if history: Rule 1.04 in the MB rule book states, " The pitchers plate shall be 10 inches above the level of home plate. The degree of slope from a point 6 inches in front of the plate shall be 1 inch to 1 foot and such degree of slope shall be uniform". The rule book gos on to detail other mound specifics regarding the pitching rubber, the diameter and the size of the level area on top of the mound. It didn't used to be this way. In the late 1800's approximately 1859, there was no pitching rubber, only a line that was drawn in the dirt about 45 feet from the home plate. A few years later they changed the line to a box so the pitchers could no longer take 2 or 3 steps before throwing the ball from the line. The front line of the 6-foot square box was still 45 feet from the home plate ....not 60 feet 6 inches like it is today. ...  more