Prague is the classic of Europe, and St. Witt's Cathedral is the classic of Prague, that is, the classic of classics. The first sight of St. Witt's Cathedral looks like a huge sculpture, because it has all the complicated lines, delicate patterns, exquisite degree, the integration of artistic styles of different periods so that it can not be called a building, can only be measured by crafts. Saint Vitte Cathedral, like other cathedrals, has a ribbed vault, which stands out as insignificant, unlike painted mosaic glass windows. Among them, there is a window of Musha completed by Musha at the age of 71. The picture is soft, the characters have their own characteristics, the details are delicate, so that people linger on it that they ignore other treasures. Although there was no sunshine on that day, we could not see the most beautiful moment of stained glass windows. But still occupy my eyes and mind, thinking fixed as St. Witt's Cathedral = painted mosaic glass windows.