1668 establishments in the Holy Roman Empire

German multinational science and technology company

Member of the noble Order of the Starry Cross

thumb|Princely coat of arms of the Castell-Castell family, 1901 thumb|248px|Castell, Bavaria|Castell Castle Castell-Castell was a county in the Holy Roman Empire, ruled by a branch of the Counts of Castell. It was established as a partition of Castell-Remlingen in 1668, and it was partitioned between itself and Castell in 1709. It annexed the County of Castell in 1772, and was mediatised to Bavaria in 1806.