By the European High Middle Ages, many post-Roman Early Middle Ages petty kingdoms had evolved into principalities, grand duchies, or duchies. By the European Early Modern era, many of these principalities had been mediatized into larger monarchies, but the ruling families were not considered morganatic for marriage considerations, and ranked equal to royal families in society. The various small states of the Holy Roman Empire are generally not considered to be petty kingdoms since they were at least nominally subject to the Holy Roman Emperor and not fully independent.