Question

How have historical buildings and paintings proved useful as a source of history?

Answer 1

it's almost uncountable because most of them prove useful as a source of history
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Answer 2

Some historical buildings gives useful information on the living condition at that time. Tombs are of great historical significance. Paintings are regarded as useful source. For example, if we consider the painting Mona Lisa, then we will get a idea about Leonardo Da Vinci who was the painter of Mona Lisa.

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