The best known system is the French Ancien Regime (Old Regime), a three-estate system used until the French Revolution (1789 -- 1799). Monarchy was for the king and the queen and this system was made up of clergy (the First Estate), nobles (the Second Estate), and peasants and bourgeoisie (the Third Estate). In some regions, notably Scandinavia and Russia, burghers (the urban merchant class) and rural commoners were split into separate estates, creating a four-estate system with rural commoners ranking the lowest as the Fourth Estate. Furthermore, the non-landowning poor could be left outside the estates, leaving them without political rights. In England, a two-estate system evolved that combined nobility and bishops into one lordly estate with "commons" as the second estate. This system produced the two houses of parliament, the House of Commons and the House of Lords. In southern Germany, a three-estate system of nobility (princes and high clergy), ritters (knights), and burghers was used.

Answer this question: who made up the first estate in french society? Let's think fast. Stream of consciousness:
To answer the above question, the relevant sentence is: Monarchy was for the king and the queen and this system was made up of clergy (the First Estate), nobles (the Second Estate), and peasants and bourgeoisie (the Third Estate). So the final answer is clergy.