Androcles and the Lion(1969)

Original title: Androklus und der Löwe

Rome at the time of the persecution of Christians: Androclus, a poor tailor, frees a lion in the forest from terrible pain caused by a thorn in his paw. The two meet again by chance when the devout Christian is about to be thrown to wild animals in the arena. The lion spares him with gratitude, but the real danger for Androklus comes from another direction.