'A classification according to general type.'

A typology consists of a collection of a single type or class of photographs, with the collection itself being more important than the individual components.

Karl Blossfeldt

Karl Blossfeldt was a German photographer who was born in 1865, he is best known for his close-up photographs of plants and living things which he used home-made cameras to take that could sometimes magnify a subject to thirty times its size which allowed him to capture optimum detail of plants and living things.

Brenda and Hilla Becher

Brenda and Hilla Becher were a married couple who worked as German conceptual artists and photographers  as a collaborative duo. They are best known for their extensive series of photographic images, or typologies, of industrial buildings and structures