Why is the Portuguese coat of arms set at an angle of 17° on the façade of Rossio station? Where in Portugal was The Magic Flute played for the first time and why did Mozart dedicate it to his master Cagliostro? What is the theory concerning the fifth dynasty of Portugal, traces of which are found in the street layout? Where can you find the most beautiful azulejos secreted around the city? Why and how did Lusitania become Portugal (Porto Graal), the place harboring the legendary Holy Grail? Where can you find the Lisboan serial killer's head preserved in formalin? Why was the south doorway of the Jerónimos Monastery designed according to Hebrew Kabbalistic principles? What symbols are concealed within the Saint Vincent polytych at the Museum of Antique Arts? Who in fact are the Sebastianists, messianic in the style of Shiite Muslims, awaiting the return of the lost King Sebastian?Since the Middle Ages, Lisbon has been a favorite site for the development and application of the theories of alchemist kings, masonic ministers, occult poets, followers of hermeticism and the secret knowledge of the Knights Templar, who found refuge in Portugal after they were banned from the rest of Europe in the 14th century.Far from usual crowds and clichés, Lisbon still keeps well-hidden treasures that it reveals only to the inhabitants and the travelers who know how to think outside the box.