Twenty-four members of the House of Kettler and six members of the Biron family are buried at this location. Initially, the remains of dukes and their family members were placed in a vault under the chapel, the sarcophagi were later moved to the basement rooms under the new Jelgava Palace. The vault contains 21 metal sarcophagi and nine wooden coffins, all adorned and decorated with fine engravings and ornamental details. The oldest pewter sarcophagus belongs to Sigismund Albert, the son of Duke Gotthard. Sarcophagi from earlier periods (the end of…