WARSAW, Poland (AP) — As foreign leaders expressed solidarity with France as it mourned the damage at Notre Dame Cathedral, people around the world shared their grief on social media along with unforgettable memories from the Paris landmark.

They posted selfies and family photos that were taken at Notre Dame days, years or decades before a fire burned through the Gothic church's roof and brought down the spire on Monday. Some wrote of their disbelief. Others, saying no words adequately expressed their feelings, posted dramatic images of the architectural masterpiece engulfed in flames or the s...