I had a look and it appears that I deleted all the sheep photos when the flock was sold. Sorry! I will try to describe ...
My folks' set up was a system of movable panels that all hooked together. The pens could be adjusted to size according to whether the ewe had a single, twins, triplets, etc., and then removed to accustom the moms and babies to living with another set of ewe and lambs, and eventually all removed to become part of the group.
The barn was built specifically for sheep and for lambing, so it was a large metal building, insulated, with wood on the bottom half of the interior and tin above, with those transparent panels up high for natural light. Also, circulating fans and TONS of outlets along the walls, so electricity was always nearby if a heat lamp was needed. There was also water to the building. Concrete floor with rubber mats on top, for cleanliness and ease of cleaning.
There were several small doors to the outside (a normal sized person had to bend in half) along with the man door and large sliding door. When lambing season was over, the jugs were all removable, so they could be stacked out of the way and the building used for whatever else was needed. (I once shot a group of ladies for boudoir sessions in there!)