nostalgia
//nɒˈstæl.dʒə//
Noun
1
A sentimental longing or wistful affection for a period in the past.
Looking at old photographs filled her with nostalgia for her childhood.
2
Something that evokes feelings of nostalgia, such as an object, place, or experience from one's past.
This old photograph is a real nostalgia for me.