Géza Gárdonyi, born Géza Ziegler (3 August 1863 – 30 October 1922) was a Hungarian writer and journalist. Although he wrote a range of works, he had his greatest success as a historical novelist, particularly with Eclipse of the Crescent Moon and Slave of the Huns.
Gárdonyi was born in Agárdpuszta, Kingdom of Hungary, the son of a machinist on the estate of an aristocrat in Western Hungary. He graduated at a college for teachers and worked for some years as a teacher and Catholic cantor. He married Mária Molnár in 1885, but their marriage was unhappy and they separated in 1892.
Gárdonyi's career as a writer started off when he began writing for magazines and newspapers in the mid-1880s. His first successes were the satirical "Göre Gábor" letters on rural life, works which he later repudiated. Around the turn of the century, he started to tackle historical themes in writing, which resulted in a series of fine novels.
He moved to Eger (today's northern Hungary) in 1897 with his mother and lived there until his death. He is also buried there, with his tomb bearing the inscription Csak a teste ("Only his body"). The house where he lived and did most of his writing is now preserved as a museum.