Turkish author Ipek Calislar has been acquitted of insulting modern Turkey's founder, Mustafa Kemal Ataturk.
Mustafa Kemal Ataturk is revered in Turkey
Prosecutors said Ms Calislar had insulted Ataturk when she said, in a biography of his wife Latife, that he had once fled disguised as a woman.
She faced up to four years in prison under Turkey's tough law against denigrating "Turkishness".
The European Union has pressed Turkey to reform the law, which it views as a bar on freedom of expression.
The law has led to court cases against dozens of writers and journalists, including acclaimed novelists Orhan Pamuk - this year's Nobel laureate for literature - and Elif Shafak.
Both were also acquitted.
Excerpts from Ipek Calislar's book, called Latife Hanim, were published in the mass-circulation daily Hurriyet.