This lovely little medal shows a miraculous event in the life of St Clare. In 1243 the invading Saracen army of Emperor Frederick came to sack the town of Assisi. St Clare's convent church of San Damiano was outside the walls of the town and made an excellent first target for the troops who hoped to carry off the riches of the church.
On the front of the medal you can see St Clare standing at the walls of the convent with the invaders climbing a ladder right in front of her. She's holding the ciborium aloft while the sister behind her kneel in prayer. The wall and towers of the town of Assisi can be seen in the background. The motto around the edge is in French and translates as "St Clare Pray for Us".
This medal is only about 1/2 inch across. It's amazing to me how much detail has been fit into such a tiny space!
St Clare was also known for spinning fine thread to be used in weaving articles needed by the church, making her the patron saint of needle workers, and could see the mass in progress projected on the wall of her cell while she was sick in bed, making her the patron saint of television.