Pistoia is the capital of Tuscan province of Pistoia in Italy. It has 90,315 inhabitants (December 31, 2015) and is 30 km from Florence on the river Ombrone Pistoiese. Today Pistoia is an industrial city, which is known for metal products and the largest concentration of nurseries in Europe. Pistoia is the seat of the Roman Catholic Diocese of Pistoia, which dates back to the 3rd century.