Mr. and Mrs. Mas (plaintiffs) were graduate students at Louisiana State University (LSU). Mr. Mas was a French national, and Mrs. Mas was from Mississippi. They married at Mrs. Mas’s home in Mississippi before returning to LSU for two years; then, they moved to Illinois for approximately four months, after which they moved back to Louisiana. While the couple lived in Louisiana, their landlord, Perry (defendant), watched them through a two-way mirror in their bedroom, without the Mases knowledge or consent. The couple filed suit against Perry in federal court in Louisiana, and Perry challenged the court filing, alleging that Mrs. Mas was not diverse from him. The district court held that Mrs. Mas was a resident of Mississippi, and Perry appealed.