Gabriel von Seidl (9 December 1848 – 27 April 1913) was a German architect and a representative of the historicist style of architecture.

He was the first son of the wealthy baker Anton Seidl and his wife, Therese, daughter of the brewer Gabriel Sedlmayr.

[citation needed] In 1902, von Seidl founded the Isartalverein (Isar Valley Association), and the Who's Who of the elite Munich culture establishment soon joined.

[citation needed] In 1903 and 1904, the first mass protests against grand engineering projects that altered ecosystems were recorded in Germany.

[2] The Bund Heimatschutz (abbreviated BHU, Federation Homelandprotection) was, like the National Trust in Britain, assembled to appeal to as many Germans as possible.

His brother Emanuel von Seidl was also an architect, but because his work focused mainly on private residential buildings, he is not as well known today.