Johan Andreas Altenburg

He belonged to the patriciate of the port town of Skien and was the maternal grandfather of playwright and theatre director Henrik Ibsen.

Johan Altenburg was originally a ship's captain, but stopped sailing at a relatively young age.

Altenburg ran a lumber trade, owned several ships, a farm and a large brewery in the community of Bratsberg.

Following his death and his daughter's marriage to Knud Ibsen in 1825, his considerable fortune passed to his son-in-law, who however went almost bankrupt due to failed speculations in the mid-1830s.

[3][4] Altenburggården manor burned to the ground in the 1886 citywide fire which also reduced much of Skien to ruins after which the center of town was rebuilt.