September 14 is the feast day of the Exultation (or Triumph) of the Cross in the Roman Catholic tradition. According to the ancient story, St. Helen, the mother of the Roman Emperor Constantine, discovered the cross upon which Jesus was crucified on this date in 326 in Jerusalem.

A great fresco cycle by Piero della Francesco (c. 1415-1492) in the Basilica of S. Francesco in Arezzo, Italy depicts the Legend of the True Cross (c. 1452-56), including the saga of the 80-year-old Helen's voyage to the Holy Land and her successful efforts to locate and prove, by miraculous means, the authenticity of the cross of Jesus. One of the most important and beautiful masterpieces of the Italian Renaissance, Piero's visual narrative is based on the story as told in The Golden Legend of Jacopo de Voragine. This popular book about the lives of the saints traces the wood of the tree under which Adam was buried through encounters with Solomon and the Queen of Sheba to the Roman occupiers of Jerusalem who used it to fabricate the cross of Jesus' crucifixion. In this illustration of Piero's fresco, the True Cross proves itself by raising a man from the dead (on the far right).

The church of S. Croce in Gerusalem-me in Rome, built on the site of St. Helen's palace chapel, houses a relic, or fragment, of the True Cross; this particular (and tiny) piece of wood is documented as being on this site since the 5th century. The church was last renovated in the 1740s under the patronage of Pope Benedict XIV, who made the cross of Jesus' crucifixion the focus of the Jubilee of 1750, when pilgrims travelled to the Eternal City from across the Christian world. Architect Domenico Gregorini created a lively, curvilinear facade that creates the illusion of a straight path from the church of S. Giovanni in Laterano, another important site on the Pilgrimage of the Seven Churches. Colossal sculptures across the top of the S. Croce facade depict St. Helen, Constantine, the Apostles, and in the center, two angels adoring the cross who visually announce the goal of the pilgrim's journey.
On a personal note: 26 years ago today I defended my dissertation, "The Eighteenth-Century Rebuilding of S. Croce in Gerusalemme, Rome" at the University of Michigan. The choice of the date had everything to do with the convenience of my professors and nothing with its significance. But it seems like an appropriate moment and subject for the first post in this blog, about which I've been thinking for a long while.