In Over Her Head by Elsie Russell - Parnasse.com

THE ANGEL'S TOMB
"This is where Hadrian is buried," Sandro said. After the
Vatican and they had walked down the via della Conciliazone to the
Castel Sant'Angelo, a forbidding round fortress by the river.
"Is Antinous in there too?"
"He was eaten by crocodiles," Ulla chimed in.
"In the Nile. Hadrian's wife, Sabina is here," Sandro clarified.
"He was married?"
"Duty to the Empire."
"Right."
Sandro got the tickets and handed them out. They followed him
down a tunnel then up narrow winding stairs, around an around, higher
and higher, past the barred window of a cell in which languished a giant
bronze angel. Then up some more and into the daylight of a wide
balcony that overlooked the Tiber and all of Rome. Above them was
yet a newer version of that angel, flashing his sword at the storm clouds
that rolled in from the sea.
Ula turned to Sandro," Ashes to Ashes! Dust to Dust! Why
don't you sing for it Penny, so she can hear your beautiful voice in
Latin! Go ahead, sing the Angele Dei! Make us happy and sing your
precious song!"
"I've heard him, it's unearthly," Penny whispered.
"That's just Grace, Penny. This is the fall from Grace! The
Angele Dei, Sandro." She pursed her lips and stepped away, her eyes on
the ground.
Sandro grasped the flimsy iron railing that separated them from
a sheer drop to the Tiber below, and searched the sky. Then he sang.
"Angele Dei
qui custos es mei,
me tibi commissum pietate.
Superna hodie,
illumina, custodi,
rege et guberna.
Amen."
He turned around to Ula. "There, are we happy, now?"
"That was the most beautiful thing I ever heard," Penny said.
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