Who were Cyril and Methodius?

Cyril and Methodius were two brothers born in Thessalonica in present-day Greece during the time of the Byzantine Empire. The two are known as "the Apostles to the Slavs" and are credited with creating the Slavic alphabet, which is based on the Greek alphabet. Languages such as Russian and Bulgarian use a modernized form of Cyril and Methodius' alphabet. These languages use "Cyrillic" script, with the word "Cyrillic" being derived from the name of Saint Cyril.

In Texas, there are several churches named after Cyril and Methodius, whose feast day is July 5th.  Towns such as Granger, Corpus Christi, Shiner, and Dubina, which was the first Czech settlement in Texas, all have a Saints Cyril and Methodius Catholic Church.

Here is a video taken at the Painted Church in Shiner, Texas. The historical marker in front of the church is shown near the end of the video in case you would like to learn more.