Palais Pálffy, Neoclassical palace in Innere Stadt, Vienna, Austria.

Palais Pálffy is a neoclassical palace at Wallnerstraße 6 in Vienna's Innere Stadt, built from 1809 to 1813 to a design by the French architect Charles de Moreau. Its facade has 14 axes; the Empire-style interiors were created by Raphael von Rigel. The grand staircase of hard white Kaisersteinbruch stone and the Great Hall survive partly in their original form.

Johann Graf Pálffy von Erdöd commissioned the palace from French architect Charles de Moreau; construction ran from 1809 to 1813 on the site of an earlier building destroyed by fire. Johann Pálffy died in 1908, and his heirs sold the palace in 1920 to the bank and publishing owners Richard and Artur Kola. It later housed the Allgemeines Verwaltungsarchiv until 1989 and the Federal Administrative Academy until 2004, and since November 2007 it has held the OSCE Secretariat.

The Pálffy family kept this Wallnerstraße palace as their Vienna residence; Johann Pálffy von Erdöd commissioned it and the heirs sold it in 1920 to the bank and publishing owners Richard and Artur Kola. The Empire-style interiors were created by Raphael von Rigel, and the Great Hall survives partly in its original form. Since November 2007 the building has housed the OSCE Secretariat.

The palace at Wallnerstraße 6 houses the OSCE Secretariat and is not a public museum, so interior rooms are seen only by arrangement. The grand staircase of white Kaisersteinbruch stone and the Great Hall survive partly in their original state. The building was fully renovated between 2004 and 2007 under Ablinger, Vedral & Partner.

The palace has housed the OSCE Secretariat since November 2007, after a general renovation from 2004 to 2007 planned by the architects Ablinger, Vedral & Partner. Before that it held the General Administration Archive until 1989 and then the Federal Administrative Academy until 2004. The grand staircase with steps of hard white Kaisersteinbruch stone survives in part.