.cabecera_galerias {
	background-color: #FFFFFF;
	position: absolute;
	height: 55px;
	width: 100%;
	top: 0px;
	margin: 0px;
	padding-top: 20px;
	padding-right: 0px;
	padding-bottom: 0px;
	padding-left: 0px;
}
.caja_obras {
	position: absolute;
	width: 850px;
	left: 0px;
	top: 75px;
}
.cajas_a1 {
	position: relative;
	height: 172px;
	width: 172px;
	top: 19px;
	left: 34px;
	border: 1px solid #000000;
}
.cajas_a2 {
	position: relative;
	height: 172px;
	width: 172px;
	top: 34px;
	border: 1px solid #000000;
	left: 134px;
}