Master Bertram (c.1345–c.1415), also known as Meister Bertram and Master of Minden, was a German International Gothic painter primarily of religious art.

Bertram was born in Minden. He is first recorded in Hamburg in 1367, and lived there for the rest of his life, becoming a citizen and Master in 1376, and achieving considerable prosperity.

His most famous surviving work is the large Grabow Altarpiece (or Petri-Altar) in the Kunsthalle Hamburg. There is a 45-scene altarpiece of the Apocalypse, probably by his workshop, in the Victoria and Albert Museum in London. He, or his workshop, also produced sculpture, presumably in wood. A sculpture group depicting Saint Christopher by his hand is located in Falsterbo church, Sweden.

Bertram was largely forgotten after the Renaissance until the end of the 19th century when, like Master Francke, he was rediscovered and published by Alfred Lichtwark, director of the Hamburg Kunsthalle.

The portrait we show of Meister Bertram, is by Werner Zganiacz.

From October of 1916 through January of 1917, Rudolf Steiner gave a series of nine lectures known as the Art Course. These lectures were given the title of: The History of Art. Click here to discover what Steiner said about Meister Bertram in the sixth lecture, or in the entire lecture series.