.my-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  grid-gap: 10px;
  align-content: center;
  justify-content: center;
  align-self: center;
  max-width: 1600px;
  margin: 2em 0;
}

.my-gallery figure
{
  align-content: center;
  justify-content:center;
  align-self: center;
  margin: 0;
  display: flex;
}

.my-gallery img
{
  margin: 0 auto;
  padding:0;
  max-height: 500px; 
  max-width: 500px; 
  width: 100%;
  height: auto;
  align-content: center;
  justify-content: center;
  align-self: center;
}

.my-gallery figcaption {
  display: none;
}