Pavlovsk and Pushkin

Pavlovsk Palace is an 18th-century Russian Imperial residence built by Catherine the Great for her son, Grand Duke Paul.

Below are the former military quarters, with their dedicate church. The official guard of the tsars and empress used to live there.

The Catherine Palace is a Rococo palace located in the town of Tsarskoye Selo (Pushkin).
It was the summer residence of the Russian tsars.
When the German forces retreated after the siege of Leningrad, they intentionally destroyed the residence, leaving only the hollow shell of the palace behind. Prior to World War II, Soviet archivists managed to document a fair amount of the interior, which proved of great importance in reconstructing the palace.

The most famous part of the palace is the Amber Room is a world-famous chamber decorated in amber panels backed with gold leaf and mirrors.
Originally constructed in the 18th century in Prussia, the Amber Room disappeared during World War II and was recreated in 2003. Before the room was lost, it was considered an "Eigth Wonder of the World".
Construction of the Amber Room first took place around 1701 in Prussia. The amber cabinet remained in the Berlin City Palace until 1716 when it was given by the Prussian King Frederick William I to his then ally, Tsar Peter the Great of the Russian Empire.
In Russia, the room was expanded and after several renovations, it covered more than 55 square metres (590 sq ft) and contained over 6 tonnes (13,000 lb) of amber.
The Amber Room was looted during World War II by Army Group North of Nazi Germany and brought to Königsberg for reconstruction and display. Its current whereabouts remain a mystery. In 1979, efforts were undertaken to rebuild the Amber Room at Tsarskoye Selo. In 2003, after decades of work by Russian craftsmen and donations from Germany, the reconstructed Amber Room was inaugurated.

(Unfortunately, it is not allowed to make pictures in this room, so I will let you search for them on Internet)