We visited just after Easter, but each year, on Aug. 15, the Feast of the Assumption of Mary, San Antonians of all faiths witness the same natural-light phenomenon first experienced by those
who built Mission Concepción, named for Mary and the Catholic feast day of the Immaculate Conception.
Precisely at 6:30 p.m., as the late summer sun arcs across the horizon, rays of light will pass through
two windows on the mission’s western wall, illuminating the face of Mary, the Biblical mother of Jesus, as she is depicted in the painting
of the Immaculate Conception that hangs behind the altar on the sanctuary wall.