The true treasures of a church are its saints. Their relics are kept and worshipped with due care. The same applies to the Basilica of Saint Servatius - to its Treasury. The property of the treasury, which is still quite sizeable, is just a fraction of the original amount of its church treasures.
The Church treasures undoubtedly originated from Saint Servatius himself. As legend has it, he took all of the church treasures, comprising the bones of his predecessors, with him when he left Tongres. These remains of saints, called relics, are encased in precious metals adorned with gems or in valuable fabrics.