It is a popular day-trip for non-believers too, with abundant grill restaurants (like most places in Argentina) and souvenir shops with kitsch religious memorabilia.

The huge church towers over the surrounding flat country and houses the tiny 38 cm (15 in) high statue of the Virgin.

A large and important organ by French builder Cavaille-Coll stands in the gallery in a state of deterioration, although efforts are underway to see to its restoration.

[2] Luján is also home to the Enrique Udaondo museum complex, housing exhibitions of colonial life in the house of the Viceroy and old town hall, with art, uniforms, silverware and transport with many antique vehicles including Plus Ultra the first hydroplane to cross from Europe to Argentina and La Porteña, Argentina's first steam locomotive operated by Ferrocarril Oeste.

Also on display are the prison cells where Colonel William Carr Beresford, commander of the 1806 British invading forces, and General Cornelio Saavedra, president of the first national government (Primera Junta) in 1810, were held.