Vivaldi lived from 1677 approximately, to 1741, so he lived in the last part of the 17th century, and into the 18th Century.
The mitre (British English) (/ËmaÉªtÉr/; Greek: Î¼Î¯ÏÏÎ±, headband or turban) or miter (American English; see spelling differences), is a type of headgear now known as the traditional, ceremonial head-dress of bishops and certain abbots in traditional Christianity.
1 These miter slots (or miter grooves) are used to position and guide either a miter gauge (also known as a crosscut fence) or crosscut sled. 2  The miter gauge is usually set to be at 90 degrees to the plane of the blade's cut, to cause the cut made in the workpiece to be made at a right angle.