Sculptures in the Middle Ages were primarily found in churches and cathedrals. These sculptures were of various types, religious and funerary being dominant. Religious sculptures usually depicted saints or figures and stories from the Bible. Some scu...
Constantin Brancusi made it/them, but I find no evidence they were made for anyone in particular (see below): "Brancusi extended his experiments with simplifying forms to his exploration of the bird in 1912 with Maiastra, a sculpture named after a mi...
I do not know London well enough to answer this, however I have ordered a toy or two from Sam (Tesselate) at tessletoys. perhaps you could look there for ideas.