The eastern neighbors had been converted to Christianity with the reign of the Byzantine Empire. Cyrillic alphabets were introduced and developed in the regions. Scientific knowledge were also transferred to the eastern neighbors during the Middle Ages.
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She's also jealous of Anne's relationship with her son, wanting Peter to confide in her rather than in Anne. However, Mrs. van Daan does have a few strong points. She occasionally can be reasonable and back down from fights, is generally neat and tidy, and is often easier for Anne to approach than her own mother.