Unlike Napoleon, who stayed here after his forces took Moscow in 1812, you will need a ticket to enter. There are a number of ticket booths, the most important being located in Alexandrovsky Sad (on the west side of the Kremlin), which in itself is a great people watching place. Having bought your tickets, leave any large bags in the cloakroom located near the ticket office, under the gate.
A "Kremlin Territory" ticket gets you into the site itself, along with all of the cathedrals and the more ancient buildings. To visit the Kremlin Armoury (where all the sparkly diamonds, jewels and so on are stored) you must buy a separate — and considerably more expensive — ticket, which will have an entrance time on it. This ticket can only be purchased before you enter the Kremlin.
Note that some buildings — in particular the Patriarch's Palace — sometimes host special exhibitions, entrance for which you must pay extra. The tickets for special exhibitions can usually be bought at the entrance to the buildings in which they are held, although it is advisable to check before you enter the Kremlin.
Inside the Kremlin
Cathedral of the Archangel Michael. A relative youngster on the Kremlin church scene, this cathedral was erected in 1505 and holds the tombs of Russian rulers from Ivan I to Tsar Ivan V. It also has more of an Italian renaissance feel to it with its Corinthian gables and turrets and white stonework.
Annunciation Cathedral. This imposing cathedral, where Russia's Tsars were christened and married, was built by Pskov architects in 1482. The frescoes inside are considered to be some of the most valuable in Moscow given that prominent artists of the time including Andrey Rublyev (also buried here), Theophanes the Greek and Prokhor of Gorodetz all worked on them.
Church of the Deposition of the Robes. Taking its name from an ancient festival where the Virgin's robes are transferred from Palestine to Constantinople (now Istanbul), this is a more modest cathedral nestled in a corner. Built in 1484-1485 by artists from Pskov, this church notably has stained glass windows. Along with some fine icons, inside you can also find wooden sculptures from the 15th century.
Cathedral of the Assumption. The grandfather of all the Kremlin churches, the Assumption Cathedral is the oldest and the biggest. Built in 1475 by Italian architect Aristotle Fiorovanti, this is where Ivan the Terrible was crowned Emperor in 1547 before becoming a stable for Napoleon's horses in 1812. Their soldiers made off with the chandeliers now hanging overhead, some weighing over 5 tonnes. The cossacks brought them back after they caught up with the light-fingered Frenchmen. In 1918 the last Easter service was held here. Services resumed in 1990.
The Patriarch's Palace. Once the home of the Moscow Patriarch, this grand medieval building is now a museum where ecclesiastical treasures of the Orthodox church are on display as well as various precious tableware, furniture, jewellery and clothing used in the court of the medieval Tsars. The building also often houses temporary exhibitions.
The Ivan the Great Bell Tower. The impressive 60 metre high tower was built between 1505 and 1508. The adjoining belfry was built 15 years later and contains some 20 bells. The biggest bell (the world's largest no less) however was too big to remain in its place and sits to the rear of the tower with a huge crack in it. In recent years the belfry has become home to a new high-tech exhibition which illustrates the history of the Kremlin's changing architectural styles. It is also now possible to climb up the tower (that's 137 steps to be exact) to admire the view over central Moscow and get a close up look at the bells. You must buy a separate ticket for the Ivan's Bell Tower excursion at the excursion office before you enter the Kremlin and you can only go up the tower at the time indicated on your ticket.