Yes, there are early Catholic writings that mention the use of stained glass windows in churches. While stained glass windows have a long history dating back to ancient times, their use became particularly prominent in medieval European cathedrals and churches. While there may not be specific treatises solely dedicated to explaining the use of stained glass, there are several sources that shed light on the reasons behind their inclusion in religious architecture.

One of the notable early sources is the “Naturalis Historia” (Natural History) written by Pliny the Elder, a Roman author and naturalist who lived in the first century AD. In his work, he mentions the use of colored glass in windows as a way to let in light while also providing visual beauty. Although not specifically Catholic, this text influenced later thinkers and builders.

In the context of the Catholic Church, Saint Augustine of Hippo, a renowned theologian who lived in the 4th and 5th centuries, wrote about the significance of light and its symbolism in Christian worship. He discussed the use of stained glass windows as a way to transform natural light into a divine radiance that could inspire awe and contemplation among the faithful. St. Augustine believed that the interplay of light through stained glass created an atmosphere conducive to spiritual reflection.

Additionally, writings from the medieval period, such as the works of the theologian and philosopher Thomas Aquinas (13th century), touch upon the beauty and spiritual symbolism of stained glass windows. Aquinas argued that beauty in sacred art, including stained glass, can elevate the minds and hearts of the viewers, leading them to contemplate divine truths.

In the context of the Catholic Church, Saint Augustine of Hippo, a renowned theologian who lived in the 4th and 5th centuries, wrote about the significance of light anmbolism in Christian worship. He discussed the use of stained glass windows as a way to transform natural light into a divine radiance that could inspire awe and contemplation among the faithful. St. Augustine believed that the interplay of light through stained glass created an atmosphere conducive to spiritual reflection.

Additionally, writings from the medieval period, such as the works of the theologian and philosopher Thomas Aquinas (13th century), touch upon the beauty and spiritual symbolism of stained glass windows. Aquinas argued that beauty in sacred art, including stained glass, can elevate the minds and hearts of the viewers, leading them to contemplate divine truths.