During a walk from his home village to Mexico City early on the morning of December 9, 1531, (the Feast of the Immaculate Conception in the Spanish Empire), the peasant Juan Diego saw a vision of a young girl of fifteen or sixteen, surrounded by light, on the slopes of the Hill of Tepeyac. The Lady asked for a church to be built at that site in her honor, and from her words Juan Diego recognized her as the Virgin Mary. Diego told his story to the Spanish bishop, Fray Juan de Zumárraga, who instructed him to return and ask the Lady for a miraculous sign to prove her claim. The Virgin told Juan Diego to gather some flowers from the top of Tepeyac Hill. It was winter and no flowers bloomed, but on the hilltop Diego found flowers of every sort, and the Virgin herself arranged them in his tilma, or peasant cloak. When Juan Diego opened the cloak before Zumárraga the flowers fell to the floor, and in their place was the Virgin of Guadalupe, miraculously imprinted on the fabric. --Wikipedia
The Our Lady of Guadalupe Silver Rose Program began in 1960 as a project of the Knights of Columbus Columbian Squires of North America to honor the Blessed Virgin under her title of Our Lady of Guadalupe, Patroness of the Americas. The program has continued since then as a project in several Knights of Columbus jurisdictions. Each year, a Silver Rose "honoring Our Lady of Guadalupe and reaffirming our commitment to the sanctity of human life" is carried by Knights from Canada, through the United States, and into Mexico to arrive at the Basilica in Monterrey, Mexico on December 12, Feast of Our Lady of Guadalupe. This year, four Silver Roses will travel from Canada to Mexico. One of the Silver Roses is expected to arrive in Maryland from West Virginia and will remain in Maryland for three weeks when it will be delivered to Knights in Virginia. Knights of Columbus Councils and Fourth Degree Assemblies will host a Silver Rose Prayer Service on each of the 21 days the Silver Rose will be in Maryland.