The Crown of Fire is a medieval legend focused on the Spanish town of Monforte de Lemos, in the Autonomous Community of Galicia (NW Spain).
Basically the plot revolves around an underground passageway to join the Count's Palace (the town of Monforte de Lemos) to the Church of San Vicente del Pino. During the absence of the Count of Lemos, who left trip to meet real parcels, the abbot of the Benedictine Monastery of San Vicente, would have served the underground corridor mantenr an illicit affair with the daughter of Earl. When Earl returns (aware of the affair) invited the abbot to a sumptuous meal. When Earl orders his servants to serve the dessert, a servant of the Earl brings a crown of red-hot iron, with which the abbot corona, causing death.