His grandson Jacob Riggisberg established the Franciscan monastery in Fribourg on 15 May 1256 and was probably living in the city by that time.

He granted Petermann von Wichtrach the full Zwing und Bann rights over the village on 28 September 1358.

He brought with him his noble wife, the Marquise Masson de Bessé and a black servant in livery, which excited the villagers.

Karl Albrecht Ferdinand was a member of the Swiss Guard in the French court and was the last owner to hold the Zwing und Bann right over the villagers.

The following year, Karl Albrecht Ferdinand von Erlach died after falling off a ladder at the family castle in Spiez.

Switzerland remained a vassal state of the French Republic until Napoleon's defeat and the Congress of Vienna in 1815.

After retiring he spent his summers at Riggisberg Castle until he sold it to his youngest son Franz Georg von Steiger in 1830.

[1] On 31 August 1832, weapons and ammunition were discovered at the Erlacherhof, which had been stockpiled by the "Council of the Sevens" who planned to overthrow the reform-minded government.

Franz Georg von Steiger was wrongly suspected as a co-conspirator, arrested and then set free after he paid a fine of fifty francs.