An exhibition, Bulgarian Codex Suprasliensis from the 10th Century in the Context of Byzantine-Slavic Mutual Relationships was organized by the Bulgarian Embassy in Prague and the ASCR, under the auspices of the President of the Academy of Sciences, Professor Jiří Drahoš, at the seat of the ASCR in Prague. A unique exposition presented one of the oldest Old Slavic remembrances, Codex Suprasliensis. This venerable document was created in the 10th century at a religious center established by the disciples of Cyril and Methodius in the then capital of Bulgaria, Preslav, and it is written in the Glagolitic alphabet.