Altar, Borgund Stave Church, 1620-54. Norway
The altar piece is identified as Renaissance at http://www.coast-alive.eu/content/borgund-stave-church/
I did not note the year 1654 on it in the dark, but it is apparently there, see site. The altar table itself is medieval, and contains spaces for relics.
2. The pulpit dates from 1550, and is the oldest pre-Reformation pulpit in Norway, see Coast-Alive. Sites do not always agree on precise dating.
Pulpit, Borgund Stave Church, made in Romsdal, Norway
That door is equally unobtrusive when seen from outside, at the covered gallery. Is the ironwork original?
Another doorway, open to the outside gallery, shows decorated panels.
5. The main portal is medieval, and opens through three basic nave areas to the altar. St. Andrew's crosses ring an upper level. It is not clear whether that upper level was actually used.