Nikola Tesla distinugished Croatian-American inventor
and his high-school education in Croatia


Nikola Tesla (1856-1943) in his laboratory in Colorad Springs in 1899,
with the book  Ruđer Bošković, a famous Croatian scientist from the 18th century..

Martin Sekulić (1833-1905), professor of Mathematics and Physics in Rakovica (now a part of the city of Karlovac)
in Croatia, in the High Real School which Nikola Tesla attended in the years 1870-1873.
Sekulić is probably the most important professor in entire schooling of Nikola Tesla.
His experiments enthusiasted young Tesla for electricity and magnetism.
Martin Sekulić was an active researcher and a member of the Academy of Sciences in Croatia's capital Zagreb,
in the Department of Mathematics and Natural Sciences.
The working language in the High Real School (Obere Realschule) in Rakovica was German.
Rakovica was then a part of the Croatian Miliatry Frontier,
 i.e., (according to the then terminology) of  Kroatischen Militär-Grenze, or Hrvatska krajina, or Hrvatska Vojna krajina.
Later, the name of Hrvatsko-slavonska Vojna krajina was also used.

Some of the compulsorly subjects that young Nikola Tesla listened to as a student of the VI'th grade (roughly, age of 16)
are shown below. The source is the  school record of the Rakovac High Real School for the period of  1872-1874.

Kroatische Sprache - Croatian language

Mathematics

Physics

With sadness we have to point at the following mistake made by the Kunshistoriches museum in Vienna:

Iulius Clouius [sic!] sui ipsius effigiator Ao:aetat: 30.salut: 1528.

i.e., Croatus has been omitted on the web page of the Kunsthistorisches Museum.

The same mistake can be seen on europeana.eu, referring to Kunshitorisches Museum as the data provider:


Noticed on 21 Jan. 2013, see JPG_kunsthistorishecs_museum, JPG_europeana.eu
The mistake at Kunsthistorisches Museum has been corrected in March 2014,
but at europeana.eu it is still not corrected (as of April 2014).
As of September 2014, europeana.eu changed its web page to the indicated address.
Also, europeana.eu changed its link from referring Kunshitorisches Museum (with corrected mistake)
to kulturpool.at, containing the same mistake.