text: By 1944 there were 13 main concentration camps and over 500 satellite camps. These were not solely for Jews though.\n\nIt has been estimated that between 1933 and 1945 a total of 1,600,000 were sent to concentration work camps.  Again not solely Jews.\n\nThis does not refer to extermination camps.\n\nI have given you an excellent web link with lots more detail.  This actual link refers directly to cocentration camps, but the rest of the site might also prove helpful.  It's aimed at school students.