Hello Bob
The Tsaritsin pavillion of Olgin Pond is similar in design(both by Stakensneider), and i at first wasn´t too sure but this one is the Rose(Ozerky) pavillion, i checked that before posting.
BTW, last time i saw the Tsaritsin and Olgin pavillions(back in 2003) they were being restored so hopefully we´ll see the work finished soon...