A Ruined Church

This was written in early December, and I'd forgotten about it until today.
 
A Ruined Church
 
I walked through the ruins that day
The roof bare to the winds and rain
No one left here to mourn or pray
A place where once our God did reign
 
A sparrow lights on fallen stones
As I wander, through a desolation
This is the graveyard time of bones
An ending to that firm foundation
 
And I gather stones, and one by one
Begin to build, once more with hope
The clouds are parting, again the sun
My back is aching, but I will cope
 
Francesco, why do you try, they say?
But I heard God call one fateful day