This is from another website. I referred to the bridge in a few places as St. Charles Bridge but it is just the Charles Bridge.
Charles Bridge is on the top of every Prague visitor's must-see list. It is also popular with Czech artists, musicians and souvenir vendors whose stands line both sides of the bridge year-round. A great time of day to come to the bridge is at sunset when one can enjoy a breathtaking view of the fully lit Prague Castle against the evening sky. The bridge is now a pedestrian zone (although both tram and car traffic were allowed there in the past) and is almost constantly filled with people. If you want to have it all to yourself, go there at night or very early in the morning.