The condition of the palace as late as 2000
For more photos of the palace and grounds when it was in decay, and then after being completely restored in meticulous detail in time for St. Petersburg's 300th birthday, click here. And to learn more history of the palace, including why it got into such bad shape, go here. Estimates of the cost of restoring the palace, park and gardens plus expanding the scope of the project to include "cottages" for visiting guests are as high as $350 million.
To learn more about the Constantine Palace, here's the official website.
The villas in the upper right welcome heads of state and other dignitaries.
Some excellent video footage of the interior and exterior of the palace.
On Kade's and my visit to Moscow and St. Petersburg in 2007, we did not visit Constantine Palace. I really didn't even know it existed. However, we did get to see these magnificent ones: