Why do people save artifacts like these even if the objects don’t have much monetary value ?

I think because they were a great value in past history

Sentimental value.

Explanation:

example. My mother had a teapot, she used this teapot every day. My mother passed away and I was left with it. The teapot is worth close to nothing in monetary value, but it means so much to me. Every time I see this teapot I think of my mother. This teapot has value. Sentimental value.

I hope this helps!

It's an informal letter

Explanation:

Because it is written to people who you know.

You first of all start with writing the topic of the letter, then be concise and give adequate details, write the introduction, body and then give conclusion of the letter.

This are the right steps to follow in order to give / write a good letter.

I guess it be of help in any way to you.