It looks so frightened D: I think it is your national owl, Athene noctua, also called little owl. Maybe a couple of weeks old? According to wiki they leave their nest after about 7 weeks. So they become independent pretty quick. Hope its parents will find him.
Thanks for sharing :o)
It is frightened the poor guy, it's their first flight season now and it's common to find babies around. We had it on the roof for 2 days, the parents found it (we saw one from inside the window) and today the baby tried to fly again... unsuccessfully though. I believe in a couple of days it will be able to fly again freely.