The given bar graph illustrates a summary of visitors to 6 types of art museum 
centers
 in 2011. Change the spelling
centres
Overall
, Linking Words
minimum
 of 3 million sightseers Add an article
a minimum
has
 visited the art galleries. 
Correct subject-verb agreement
have
To begin
 with, in 2011 Louvre art gallery in France had the highest number of guests (8.5 million) with comparison from Linking Words
other
 6 exhibition Correct article usage
the other
museams
; Correct your spelling
museums
whereas
 Russia had the lowest number of visitors (3 million).Linking Words