People tend to ignore the architect of their house. With this being said, it’s (encouraged) important to understand the layout and style of the house before decorating and furnishing it.
If you live in a tudor, the floors typically have very dark wood—also known as an espresso color stain that people like. In contrast, very light walls (white) and contemporary art and furniture are congruous to that style house.
Having a multi-era look in a house doesn’t always work. For example, a 70s built house does not mesh well with a theme of a mid-century style house. For split level houses, it wouldn’t look appropriate to have an english colonial feel to it.