Google has collected a series of online exhibits focused on Abraham Lincoln's Gettysburg address — his famously concise speech reflecting on the Civil War as a test of America's founding principles — which was delivered 150 years ago today. Though the address is famed for its eloquence, scholars aren't sure of exactly what Lincoln said that day: there are five versions of the manuscript, each of them differing slightly. High-resolution copies of each version are now available on Google, which has even set two of them side-by-side so you can explore the differences.

The exhibits are part of Google's Cultural Institute, an online museum that features exhibits from various partners. The three exhibits — which focus on Lincoln's time at Gettysburg, the different copies of the address, and works inspired by the address — include content from and curation by the White House, the Lincoln Library, Cornell University, Dickinson College and the Library of Congress. While digital scans of the address are nothing new, putting a link to them right on Google's front page makes them a lot easier for many to explore than ever before.