1719-1768 Rococo,German,German painter. He studied with his brother, Johann Ludwig Seekatz (b 1711), and with Philipp Hieronymus Brinckmann (1709-61) in Mannheim (1748-51); he became court painter to Landgraf Ludwig VIII von Hesse-Darmstadt in Darmstadt in 1753. china oil painting Johann Conrad Seekatz Verstonbung der Hagar