Cyril was born in Jerusalem in about the year 315 and became bishop in about 349. He lived in tumultuous times, and was exiled three times, once by the Athanasians and twice by the Arians. He attended the Council of Constantinople in 381 and supported the Athanasian view of the Trinity.
Cyril is important to us chiefly for three things. It is believed that he was the author of the precursor to the Nicene Creed we use today. Secondly, he organized activities for pilgrims and much of what we do during Holy Week comes from what was done in Jerusalem during his Episcopate. (An account by a Spanish nun is available here: http://www.ccel.org/m/mcclure/etheria/etheria.htm) Thirdly, he is the author of a series of lectures (18 for Lent and five for Easter) given to candidates for baptism and the newly baptised. These probably do not exist in the original form, but he is the original author. (They can be ordered here: http://www.amazon.com/exec/obidos/ISBN=0913836397/bookofcommonprayA/ or viewed here: http://www.crossroadsinitiative.com/library_author/4/St._Cyril_of_Jerusalem.html)
Collect: Heavenly Father, you raised up Cyril as Patriarch of Yerushalayim to guide Bishops and Presbyters in their calling to be teachers and ministers of the sacraments. Raise up in this and every generation Bishops and Presbyters who will faithfully instruct your people in practical Christian faith and living. This we ask through the author and perfecter of our faith, Yeshuah haMoshiach our Lord, who lives and reigns with you and the Ruach haKodesh, one God in glory everlasting. Amen. (white)