Complex sentence: The Maria Theresa Thaler (MTT) coin, which has been used in world trade continuously since the first minted in 1741, has considerably extended the fame of Empress Maria Theresa, who ruled Austria, Hungary, and Bohemia from 1740 to 1780.
Split into simpler sentences: The Maria Theresa Thaler (MTT) coin has been used in world trade continuously since it was first minted in 1741. It was named after Empress Maria Theresa, who ruled Austria, Hungary, and Bohemia from 1740 to 1780.