<human>:  Can a martyr saint have been excommunicated?
<bot>: Yes, a martyr saint can have been excommunicated. Joan of Arc was excommunicated by the Catholic Church in 1431. Joan of Arc was declared a martyr in 1456 after an investigation ordered by King Charles VII. Joan of Arc was canonized a Saint by the Catholic Church on May 16, 1920. So, yes, a martyr saint can have been excommunicated.