Cyrillic script of Bulgaria to the European Union on 1 January 2007, Cyrillic became the third official script of the European Union, following Latin and Greek. Cyrillic is derived from the Greek uncial script, augmented by letters from the older Glagolitic alphabet, including some ligatures. These additional letters were used for Old Church Slavonic sounds not found in Greek. The script is named in honor of the two Byzantine brothers, Saints Cyril and Methodius, who created the Glagolitic alphabet earlier on. Modern scholars believe that Cyrillic was developed and formalized by early disciples of Cyril and Methodius. In the early 18th century,
St. Cyril Peak St. Cyril Peak St. Cyril Peak (Vrah Sv. Kiril \'vr&h sve-'ti 'ki-ril\) rises to 1,505m in Friesland Ridge in Tangra Mountains on Livingston Island in the South Shetland Islands, Antarctica. The peak is linked to St. Methodius Peak to the southwest by Vladaya Saddle and surmounts Ruen Icefall to the west, Macy Glacier to the east and Prespa Glacier to the south. The peak is "named after St. Cyril (827-869 AD) who, together with St. Methodius, created the Glagolitic alphabet and translated the Holy Books into Bulgarian language". The peak is located at , which is 4.15 km south-southwest of