According to the results of medical studies from Austria, the great composer Beethoven, whose works are considered classics of the genre of music, he became a victim of lead poisoning. A significant amount of the toxic substance contained both bone fragments subjected to research and celebrity hair. If the original version of physicians based on the possible content of hazardous mercury compounds in drug discovery, which used the musician during his fight against sexually transmitted illnesses, then a more detailed study has fundamentally change the initial opinion. In order to establish the true cause of death of the great musician employees Aragon National Laboratory submission were presented bone fragments of Beethoven's skull. A businessman from California rarity inherited from their ancestors, the line of which goes back to the Austrian doctors who treated a celebrity. Donate as a specific property of the businessman decided in the name of science and the search for truth. Beethoven's hair had the opportunity to buy in a private collection put up for auction. After a detailed study of the remains, scientists were able to establish that the lead content of the material exceeds the maximum permissible level in more than a hundred times. But how such a dangerous substance in large quantities regularly ingested a known person and there was concentrated until now remained a mystery. Today the secret has been revealed, and the history of the veil completely removed. It turns out the composer, in his last years much bothered by pain in the chest area. The doctor to whom Beethoven asked for help, applied for the treatment of this disease associated with the accumulation of fluid in the breast department, lead dressing. Despite the fact that the dose of harmful toxin initially seemed insignificant to provoke the death of the patient, but a liver disease aggravated the situation. After the post-mortem examination of the musician doctors were able to detect a progressive cirrhosis of the liver. In this case, even small doses of lead are contraindicated maestro. This case illustrates that the treatment should be individualized, and lead can act as a drug, and the strongest toxin depending on the dosage.