Travel.mapsofworld.com provides useful information on Russia Visa Information

Another important Russia visa information is that the cost of the visa depends on the type of visa applied for and the nationality of the person. Students would receive visas valid for their entire duration of their study program. If you are visiting the land of Russia for private reasons then you would be required to produce the invitation letter from the Ministry of Internal Affairs. The different types of visa given out by the government of Russia are:

• Private Visa
• Transit Visa
• Business Visa

Russia visa information also informs that the tourists may be required to submit the following documents with their visa application:

• Passport (valid for a period of at least 3 months from the date of your return)
• Correctly filled-up application form
• Proof of return to the country coming from (return ticket)
• Proof of financial ability (to meet expenses during stay in country)
• Visa Fee
• Self-addressed stamped envelope
• Three photographs, each passport-sized
• Invitation letter from Polish company or institute (in case of business and student visa respectively)