Become sculptor to someone

Does "he became sculptor to Louis XV" mean:

1. he was employed by Louis XV to make sculptures for him

or

2. he made a sculpture of Louis XV

or

3. he was employed to make one sculpture of Louis XV

Context:

Jean-Jacques won the Prix de Rome in 1748 and spent four years in Rome studying ancient art. When he returned to Paris, he became sculptor to Louis XV and provided ornamental designs for metalwork, notably for the staircase at the Palais-Royal, a famous Parisian royal residence.