The Herzgruft () is a burial chamber that protects 54 urns containing the hearts of members of the House of Habsburg. The crypt is located behind the Loreto Chapel in the Augustinian Church within the Hofburg Palace complex in Vienna, Austria. The first heart, belonging to King Ferdinand IV, was placed in the Augustinian Church on 10 July 1654, according to his wishes. The last heart, belonging to Archduke Franz Karl of Austria, was placed in the crypt on 8 March 1878. The bodies of all but three of the hearts are in the Imperial Crypt a few blocks away. History King Ferdinand IV instructed that his heart would be interred at the foot of the Holy Mother in the Augustinian Church in Vienna. Following the death of the king on 9 July 1654, the corpse was embalmed and the heart was placed in a goblet and displayed on the death bed. The next day, around 9:00 pm, the heart was transferred to the Loreto Chapel and buried at the foot of the Madonna in a simple celebration. With this simple act of piety, a custom was started to bury the hearts of all members of the House of Habsburg in the crypt alongside the heart of King Ferdinand IV. By 1878, 54 hearts had been brought to this simple crypt. Crypt Upper row In the upper row, arranged in sequence of death date (from left to right): Daughter of Ferdinand II, Duke of Tyrol and wife of her cousin Emperor Matthias. Buried in tomb 1 in the Imperial Crypt. Third son of Emperor Maximilian II. Husband of Empress Anna. Buried in tomb 2 in the Imperial Crypt. Eldest son of Archduke Charles II of Styria. Buried in the Grazer Dom, Graz. Eldest son of Emperor Ferdinand III. Founder of this Herzgruft. Buried in tomb 29 in the Imperial Crypt. Son of Emperor Ferdinand II. Named at age 13 to take over his uncle Leopold's renounced see of Halberstaedt (when he became 22, this was confirmed by the Pope) and later became also Bishop of Olomouc, Bishop of Breslau, and Grand Master of the Teutonic Knights. Buried in tomb 115 in the Imperial Crypt. Niece, cousine and first wife of Emperor Leopold I at age 15. Buried in tomb 20 in the Imperial Crypt. Third wife of Emperor Ferdinand III. Foundress of the Order of the Starry Cross (the Sternkreuzorden).