Editor's note: This is Part 2 of a two-part series. Click here to read Part 1.
Last time, we looked at architects who -- not atypically -- produced some of their best work toward the end of their long careers. In architecture, at least, it seems that old age doesn't necessarily imply an inability to grow and change. This time, we'll look at a few architects who changed their design philosophies late in life, and found even greater success.