Hungarian historian and writer
According to Wikipedia,
Simon of Kéza was the most famous Hungarian chronicler of the 13th century. He was a priest in the royal court of king Ladislaus IV of Hungary. In 1270–1271, bearing the title "master" , Simon was part of a diplomatic mission led by Sixtus of Esztergom. Andrew of Hungary was also a part of this mission. Sent by King Stephen V of Hungary to congratulate King Charles I of Sicily on the latter's return from the Eighth Crusade, the delegation travelled via Naples to Catona and Messina in December and January, then back with Charles to Rome in February.