Joseph Louis Nicholas, Count of Windisch-Graetz, Baron of Waldstein and Thal (6 December 1744 – 24 January 1802 in Štěkeň) was a nobleman, a member of the House of Windisch-Graetz, and was chamberlain to Archduchess Marie Antoinette of Austria.
He was the second son of Count Leopold Carl Joseph of Windish-Graetz (1718–1746) and his wife Countess Maria Antonia Josepha von Khevenhüller (1726–1746).
His descendants later moved this archive to the former Kladruby monastery, which they had acquired after it had been secularized.
Their son Alfred (11 May 1787 in Brussels – 21 March 1862, Vienna) was raised to the rank of prince in 1804.
Their daughter Sophie Luise married Prince Karl of Löwenstein-Wertheim-Rosenberg.