sainthood. Chureshki makes reference to Levski's correspondences, which show that Levski threatened wealthy Bulgarians (чорбаджии, chorbadzhii) and traitors with death, endorsed theft from the rich for pragmatic revolutionary purposes and voluntarily gave up his religious office to devote himself to the secular struggle for liberation. Vasil Levski's hanging is observed annually across Bulgaria on 19 February instead of 18 February, due to the erroneous calculation of 19th-century Julian calendar dates after Bulgaria adopted the Gregorian calendar in 1916. Although the location of Levski's grave has not been determined, some of his hair is on exhibit at the National Museum of Military History. After Levski gave up monkhood in 1863, he shaved his hair, which his mother and later his sister Yana preserved. Levski's personal items—such as his silver Christian cross, his copper water vessel, his Gasser revolver, made in Austria-Hungary in 1869, and the shackles from his imprisonment in Sofia—are also exhibited in the military history museum, while Levski's sabre can be seen in the Lovech regional museum. Vasil Levski is referenced by the video game Star Citizen, in which future society "The People's Alliance of Levski" adopt an ideology based upon his views. A pond in the Arbor Hills Nature Preserve in Plano, Texas is named in honor of Vasil Levski. References Footnotes Bibliography . External links Pure and Sacred Republic — Levski's letters and documents Online edition of Vasil Levski's personal notebook Vasil Levski in Haskovo Vasil Levski Museum in Karlovo Vasil Levski Foundation 1837 births 1873 deaths People from Karlovo Bulgarian revolutionaries Bulgarian Orthodox priests Bulgarian educators Executed revolutionaries Eastern Orthodox monks People executed by the Ottoman Empire by hanging Executed Bulgarian people 19th-century Bulgarian people 19th-century executions by the Ottoman Empire Bulgarian expatriates in Romania Levski Sofia 19th-century Eastern Orthodox priests Bulgarian nationalists