When the piano was invented was it used instead of the harpsichord?

I may be inaccurate on this answer, but according to a presentation I did on the history of the piano, the harpsichord was used from the 15th to the 18th century. The earliest reference to a harpsichord was in the year 1397, where Padua wrote that a certain Hermann Poll claimed to have invented an instrument called the "clavicembalum." Another reference was a 1425 sculpture in Northwest Germany. According to research, the inventor of the harpsichord is still unknown, but an instrument far older than the harpsichord is the organ, and a psaltery was a widely used instrument in the Middle Ages. (It was hand-held also) But the piano was invented in Florence, Italy by Bartolomeo Cristofori in 1700. So to answer your question, when the piano was invented, the harpsichord is still used today by people who are fascinated with its sound and it's contribution in history. Although, in homes across America, pianos are technically used more often than harpsichords. By the way, there are about 25 harpsichord builders around the U.S. There are 100 made each year for universities and orchestras. The greatest threat to harpsichords, according to maker, John Phillips, is its musical culture.