Chinese artist/activist Ai Weiwei’s “Circle of Animals/Zodiac Heads,” on display in front of the Speed Art Museum through Sept. 24, are 12 bronze animal heads from the Chinese astrological calendar. Ai was also an artistic consultant for the Beijing National Stadium (aka the “Bird’s Nest”) at the 2008 Summer Olympics. Jeffrey Johnson, director of UK’s School of Architecture, will be speaking on this aspect of Ai’s artistic life, focusing on his interest in architectural design and his thoughts on how Chinese museums are evolving. Johnson is writing a book on contemporary Chinese museum architecture.