The kidnapping

Will you be able to solve the puzzles and ancient mathematical games collected by Fra' Luca Pacioli to free the innkeeper kidnapped by bandits?

What will your teacher have in mind today? Certainly, something strange. He proposes to you to go out blindfolded from the classroom and wait a few minutes in the darkness outside the door, until you hear three shots beat. Wait intrigued. Then, here are the three shots! Start hearing ancient music( ). The door opens in the semi-darkness. Your classroom has been transformed! To illuminate it only lanterns! And instead of the teacher you find a woman in Renaissance clothes. She is worried, her brother, innkeeper of the tavern, has been kidnapped by some bandits who have also taken away all the collection of the inn! They left only a message, which appears as an ancient enigma, to find the place where to find it!