Town House Mouse Door

Let me show you something curious.
It's a diminutive yet very grand door. It has fluted columns and an ornate segmented window in the apex canopy but who lives there?
 When you gently rapped on the lion head knocker of the miniature town house door, a friendly looking gentlemouse, in his slippers answered.
What's it like behind this door? You will only know if he invites you in or if you have an imagination of  considerable stature.
I know, but it would be very impolite for me to gossip about a small friend's interior decor.
You  decide where you situate this intriguing wee entrance. Where it leads from, to where it leads to.....
I will enclose a sticky pad to enable you to secure the piece against a backdrop. This piece will not stand alone.