1) The signing of the Magna Carta in 1215 laid the foundation for modern democratic principles and limited the powers of the monarchy in England.

2) In Greek mythology, the Minotaur is a mythical creature with the head of a bull and the body of a man. It dwells in the labyrinth of King Minos of Crete and is eventually defeated by the hero Theseus. The Minotaur symbolizes the primal and monstrous nature that resides within human beings.

3) The Eiffel Tower can be 15 cm taller during the summer due to thermal expansion.

4) The word "piano" contains three vowels: I, A, and O.