 Complete the following phrase:  Hermann von Salza was born to a dynasty of ministeriales of the Thuringian landgraves, probably at Dryburg Castle in Langensalza. With Landgrave Louis III of Thuringia he may have already taken part in the 118991 Siege of Acre, where the Teutonic Order was founded. He possibly also joined Landgrave Hermann I and the Henneberg count Otto von Botenlauben on the 