The Historical Monuments Commission (HMC) was the national heritage conservation authority of South Africa from 1923 to 1969. The HMC was the first such body to be established in South Africa and was the predecessor of the National Monuments Council and therefore also of SAHRA and South Africa's provincial heritage resources authorities. From 1934 onwards the Commission became known principally for its declaration of several hundred historical monuments, later known as 'national monuments' and today as provincial heritage sites.