[1] The emperor gave an imperial decree to four knights, Guido, Burgundio, Assalito, and Raineri de Santo Nazario, which permitted them to build castles on their lands.

[2] In the 1850s, restoration took place on the north and west wings of the castle which added Neo-Gothic style, which was fashionable at that time.

The Statue of the Virgin of the Rosary, located in the chapel, is part of an annual celebration on the first Sunday of October, that includes a procession around the village, dating back to 1571.

[2] The Counts of Sannazzaro have hosted various monarchs at the Castello Sannazzaro including the Marquesses and Dukes of Montferrat, King Charles Emmanuel IV of Sardinia in 1745, and Emperor Napoleon III and King Victor Emmanuel II in 1859.

[4][5] His daughter, Ludovica Sannazzaro, created a TikTok channel for the castle in 2021, receiving millions of views.