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Polish language would look better written in Cyrillic Script? [212]
Vesko claimed Poles used the cyrillic during the times of the Kingdom of Great Moravia.
Most probably he confounded the cyrillitic with the glagolitic script, the oldest known Slavic alphabet which was created in the 9th century by Saint Cyril, a Byzantine monk from Sołuń (Thessaloniki in Greece). He and his brother Saint Methodius were sent by the Byzantine emperor to Great Moravia in 863 where they invented Glagolitic (glagolica - Ⰳⰾⰰⰳⱁⰾⰹⱌⰰ) as the Slavic language could not be easily written using either the Greek or Latin alphabets.
So the mystery has been solved! (More popcorn, please ...)
As for Mieszko and Dobrawa,[...] I doubt he adopted Christianity to marry her.
I doubt it, too. As the chronicler Gallus Anonymous says:
"following his custom, he enjoyed his seven wifes" (wedle swego zwyczaju siedmiu żon zażywał) while being pagan, so was there really any need for another one?

Above:
Mieszko I at play with the four of his seven pagan wifes shortly before taking conversion to ChristianityEast German Slavic tribes - Oborites - (polabian slavs) from which several towns in Poland are named - Oborniki around Poznan, Oborniki Slaskie near Wroclaw, etc
This is a very brave hypothesis indeed and even the more brave because you have misspelled their name: Obotrites/Obodrites (Latin) or Abotrites/Abodrites (German) or Obodrzyce in Polish.