Explore an advanced physics lecture that delves into the Strong CP problem, continuing as the fourth installment in a series examining one of particle physics' most intriguing puzzles. Learn about the theoretical frameworks and mathematical foundations underlying this fundamental question in quantum chromodynamics (QCD) through detailed explanations and derivations presented at the prestigious Galileo Galilei Institute. Gain deep insights into the current understanding of CP violation in strong interactions and examine proposed solutions to this enduring physics mystery.