In May I was able to get into the State Kremlin Palace and Faceted Hall. This is kind of special "secret" excursion, which is not ordinary access to the Cathedrals inside the Kremlin sold publicly. This excursion is offered by some agencies on selected dates (usualy several times per month), when the Kremlin is not occupied by various events. The maximum amount of people is 20 in the group with obligatory guide, it is necessary to provide passport details in advance (the foreigners are allowed), the price is 5,000 Rubles during weekends (80 euro), but it depends on the agency. I booked about 2 months in advance in order to get in on weekend day.

Excursion lasts for 80 minutes and provides access into the Faceted Hall; 4 main ceremonial halls in the State Kremlin Palace (including that one where inauguration or official awarding takes place); medieval Terem's Hall enclosed by the present Palace and Empress's Chambers. Foto is only allowed in some places as indicated by the guide.

In overall despite extremely expensive price this is the only opportunity to see probably the most important building in Russia. All the halls were lavishly re-created and reconstructed in the 90s in accordance with original decor from the 19th century (even imperatorial thrones were put back; they are modestly covered by partitions during present date Putin's led events). Medieval parts have rich frescos and are also quite interesting and original.

In overall I liked the excursion, but unfortunately it's very expensive and not easy to get into without advance planning.