Down the road from my parents house is an old church (a tiny little one made of stone!) that has actually been a house for as long as i can remember. Im not particulary religious myself, but there is something magical about church conversions.
I think its the mixture of the volumes of the spaces, the light and the details remaining like rafters, stained glass windows & cross motifs.
This conversion below is just stunning - i love white living space with the palms & the iorn windows on the last picture. (these stairs would be totally illegal here in Australian though!)