The House of Koháry (Hungarian: Koháry-ház) was the name of an ancient and wealthy Hungarian noble family[1] with seats at Csábrág and Szitnya (now Čabraď and Sitno Castle) and the palace of Szentantal (now Svätý Anton, Slovakia).

[2] The first notable member of the family was Peter Koháry (1564–1629), who was rewarded as the Baron of Csábrág by Emperor Ferdinand II and became commander of the fortress of Érsekújvár.

His son Stephan I Koháry (1616–1664) fought against the Turks and died in the battle of Léva.

Among the descendants of Mária Antónia and Ferdinand are the last emperor of Austria (Charles I), the last four kings of Portugal (Pedro V, Luís I, Carlos I, Manuel II), and the last three tsars of Bulgaria (Ferdinand I, Boris III, Simeon II).

Their holdings were calculated to be around 150,000 hectares, making Princess Maria Antonia Koháry one the richest heiresses in Europe at the time of her marriage to Prince Ferdinand of Saxe-Coburg and Gotha.