Silésie tchèque
The coat of arms of the Czech Republic incorporates those of the three integral Czech lands: Bohemia proper, Moravia, and Czech Silesia. The arms of Bohemia originated with the Bohemian kingdom, like those of Moravia with the Moravian margraviate. The arms of Czech Silesia originated as those of all of the historical region of Silesia, much of which is now in Poland.