The history of Croatian spelling can be divided into two periods of pre-season and standard period. Any such period can be divided into three subdivisions. The pre-season period begins in the 15th century and lasts until the 18th century, marked by the first spelling in the first half of the 18th century, while the standard period lasts from the 18th century until today. The standard period was marked by the Illyrian movement and Croatian national revival, led by Ljudevit Gaj. In this paper, we will often notice the reference to Gaul's graphic reform as well as "Croatian spelling" by Ivan Broz, who have changed the spelling of roots from the Croatian language, and their rules still apply today. In this paper I will be more concerned with the standard period because it is very important for Croatian spelling history. The dagger and centuries-old Croatian orthographic concept is followed by a very burly and fierce duel between Latin and Chilean artwork, which carries with it controversy between Croats and Serbs and their "common" language, which in the end did not see the light of the day Croatia became an independent Republic of Croatia. I will mention the "struggle" between the three flamenco schools that advocated for the different spelling rules and rules in which the Zagreb fiol school came out as a winner. We will become acquainted with the meaning of the spelling itself as well as with the meaning of the graph itself, and finally with the orthographic principles that go through the whole work, and we can say that the most important for Croatian spelling is phonological and morphological spelling. At the end of the work we will be able to see the difference that Croatian spelling has changed for centuries, what it was and what it is today.