The Twenty Eleven Theme comes with 3 page templates:

1. Default template: Used on this page
2. Showcase Template: Used on Home page, Gallery & Slider page
3. Sidebar template: Used on Blog

In addition, there are 3 layouts to choose from in Twenty Eleven:

1. Content on the left
2. Content on the Right
3. One column, no sidebar

Content on the left was used on this site.