The passage is thought to refer to the efforts of the Macedonians to honour the memory of their dead king. Who are meant by reges is not at all clear, and summa nituntur opum ui, as we may infer from other passages where the same or a similar expression is used, can hardly refer to anything but the labour of the hands. Probably we ought to read regis, i.e. Philippi. The lines will then refer to the work of the people.