figure {
 margin-left: 0;
 margin-right: 0;
}

figcaption {
 font-style: italic;
 font-size: x-large;
}

figure.centered img {
 display: block;
 margin-left: auto;
 margin-right: auto;
}

figure.centered figcaption {
 text-align: center;
}

table.thumbtable {
    margin-left: auto;
    margin-right: auto;
}