He was the fifth child of Silvester Rehrenbeck (1819–1910), an affluent landowner at Ógyalla, and his wife Jozefa (Linzmayer).
After returning home to Hungary, he was made famous by his two works entitled Golgota ("Calvary") and Bányaszerencsétlenség ("Accident in a Quarry").
He painted his well-known monumental picture, the Arrival of the Hungarians, depicting the Magyar conquest of Hungary in 896, for the 1000th anniversary of the Conquest, with the help of many others, including Jenő Barcsay, Dániel Mihalik and László Mednyánszky.
It wasn't until 1995 that it was restored and exhibited at the Ópusztaszer National Heritage Park in Hungary.
After returning home, he painted smaller pictures and increasingly suffered from financial difficulties.