" Wheat from northern Italy is 'soft' - that is, it is already low in gluten so is ideal for pastry-making. Butter was the fat of choice for cooking in northern Italy (and a sign of wealth), compared with the oil of the south of the country, and there is no doubt that butter makes the finest pastry for sweet pies and tarts. (...) The situation in Britain was different. In Britain, butter was food for the poor. The wealthy in Britain preferred lard, maybe because the animal had to be killed to obtain the fat, thus its perceived value was higher. Lard makes superb huge 'raised' or 'standing' pies full of meat, which flourished to become one of the jewels in England's culinary crown. "
― , Pie: A Global History