The city of Atlanta, Georgia, in Fulton County, was an important rail and commercial center during the American Civil War. Although relatively small in population, the city became a critical point of contention during the Atlanta Campaign in 1864 when a powerful Union army approached from Union-held Tennessee.
Rare-earth compounds containing lanthanum are extensively used in carbon lighting applications, especially by the motion picture industry for studio lighting and projection.
If you're looking for elements in the lanthanide family, a good place to start would be in the earth's crust. Elements found in the earth's crust are called rare earth metals, and lanthanide elements are good examples of these. For instance, one of these rare earth metals is called lanthanide praseodymium. It's found in the earth ore monazite and is shown below. Let's step back in time a moment.