Italy's alliance with Prussia ensured an advantageous peace due to Prussian victory in the Austro-Prussian War. Tegetthoff was immediately promoted, by telegraph, to Vizeadmiral (Vice Admiral). He received congratulatory telegrams from Ferdinand Maximilian, by then the embattled Emperor of Mexico, and Vizeadmiral Hans Birch Dahlerup, former Oberkommandant der Marine (High Commandant of the Navy). Tegetthoff was decorated with the Commander's Cross of the Military Order of Maria Theresa and made honorary citizen of Vienna. Following the victory of Lissa, Tegetthoff urged Franz Josef to annex the hinterland of the Dalmatian coast, so as to protect the region for development of naval bases. This was in fact accomplished with the occupation (1878) and annexation (1908) of Bosnia and Herzegovina, though long after Tegetthoff's death. Tegetthoff undertook a journey of study to France, Britain and the United States in 1866/67. Upon the execution of Ferdinand Maximilian by the Mexican government of Benito Juárez, Tegetthoff was sent with the screw frigate Novara to bring his body home to Austria, arriving in the port of Trieste on 16 January 1868. Late years He received the post of Marinekommandant, as the chief administrative officer was named in 1865 in succession of Viceadmiral Ludwig von Fautz. In March 1868 Tegetthoff took also charge as Chef der Marinesektion (Chief of the Naval Section) of the War Ministry of the new dual monarchy. Despite considerable resistance from the General Staff, he vigorously pursued a complete reform of the Austro-Hungarian Navy; his reforms remained in force until the fall of the Donaumonarchie in 1918. On 1 April 1868 Tegetthoff was made a Geheimrat and a member of the Herrenhaus. Tegetthoff died suddenly from pneumonia on 7 April 1871 in Vienna at the age of 43. His grave is located in the cemetery of St. Leonhard in Graz.<ref>Manfred Jasser: Hoch vom Dachstein an. Das Steiermark-Brevier.Paul Neff Verlag, Wien 1990 S. 64. In 1871 One florin match in today's money about six euros.</ref> He was succeeded as head of the naval administration by Friedrich von Pöck. Memorials Memorials to Tegetthoff were erected in Maribor, Vienna and Pula. The monument on Vienna's Praterstern, the largest traffic junction of the city, consists of a column 11 meters high (by Karl Hasenauer), topped by a bronze statue of Tegetthoff, some 3.5 meters in height, by Carl Kundmann and was finished in 1886. The memorial at Pula, also by Kundmann, was erected in 1877 and