Change still perceived as feature of church (10)

I believe the answer is:
altarpiece
This might be a double definition.
'change still' is the first definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'feature of church' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'perceived as' is the link.
Can you help me to learn more?
(Other definitions for altarpiece that I've seen before include "Religious art" , "communion table artwork?" , "Painting placed prominently in church" , "Church artwork" , "Religious work" .)
