In si torbida procella" and "Vedeste mai sul prato".  
In one work, this character is played by a countertenor and sings the arias "In si torbida procella" and "Vedeste mai sul prato".  In another work, which is named for this character, he is portrayed by a alto castrato and attempts to win the love of Asteria.  In addition to the Vivaldi opera Bajazet and an opera in Italian by Handel, this character appears in one play in which Mycetes, the Persian emperor, is overthrown by a coalition containing Cosroe, the brother of Mycetes, and the father of this character's wife Zenocrates.  In that work, this character would conquer Turkey and use the Turkish king Bajazeth as a footstool while keeping him and his wife Zabina in a cage, before killing his son Calyphas and burning a copy of the Qur'an.  For 10 points—name this Central Asian conqueror and title character of a Christopher Marlowe play.
In one work, this character is played by a countertenor and sings the arias "
{Tamerlane} [accept {Timur} the {Lame}; {Tamburlaine}; other word forms]