Awad Ali Alanzi
The civil societies need civil legal system to be operative in the environment of justice and equity. Civilization and unification of the Kingdom of Saudi Arabia are also gone through the process of development in building a sound legal system in the Kingdom. This research discovers the development of the constitution, administrative law, commercial law and financial laws in the Saudi Arabia. We discussion on the historical development of constitution, administrative law, commercial law and financial laws in the Saudi Arabia. We observed that basic teachings of Islam including Qur’an, Hadith and Fiqh are the main sources to fill the legislative gaps but most of the codes of laws are derived from the French law in the mentioned domains in Saudi Arabia. Following the French law, the Islamic principles have never been ignored in developing the constitution, administrative law, commercial law and financial laws. This is a first study which discussed a comprehensive development of constitution, administrative law, commercial law and financial laws in the Saudi Arabia.