The former monarchy known for its rich oil reserves is Saudi Arabia. Oil was discovered in the country in the 1930s, leading to its emergence as one of the world's largest oil producers. The Saudi Arabian economy heavily relies on oil exports, which provide substantial revenue that drives development and infrastructure projects. The country is a leading member of the Organization of the Petroleum Exporting Countries (OPEC), playing a significant role in global oil markets. The wealth generated from oil has also led to extensive investments in technology, education, and tourism as part of a broader economic diversification strategy.