And they have to evoke sweet nostalgia, a connection to childhood, no matter what your age.
The simple, rural subjects perhaps evoked nostalgia in the richer city populations of the time.
To increase sales, some companies are even evoking nostalgia from motorcycling's boom days.
It's about the power of smell to evoke nostalgia.
In recent years, however, there seems to be a very small increase again, as they can draw on their historic roots to evoke nostalgia.
Many of these subjects evoke nostalgia, obviously enough.
But a journey by steam train evokes more nostalgia and romance than any other way of travelling.
If the place evoked nostalgia, it was in fact a tribute to it.
Still there was something about the land and sea below that evoked nostalgia.
Ned Rorem once claimed that music is the sole art which evokes nostalgia for the future.