Enigma in linea «Windmill»

Ветряная мельница на окраине города Такстед (Thaxted), графство Эссекс, Великобритания.
На заднем плане шпиль церкви св. Иоанна в городе Такстед.
Построенная в 1804 году из красного кирпича мельница, имеет высоту 48 футов (14,6 метра) и внесена в список памятников архитектуры II категории. Не знаю, чем вторая категория отличается от первой

Before the invention of steam engines, windmills were the main source of energy, especially in rural areas. On the canvases of artists of the 17-19 centuries, rarely in any landscape there was no image of a mill. They not only grinded flour, but also did various jobs - pumping water for irrigation, making cereals, squeezing oil. Currently, due to environmental requirements, humanity is returning to windmills, but already modernized. Especially in areas where constant winds blow and in remote areas. Modern wind turbines mainly generate electrical energy that people use for various needs.