Here is a simple function that will return the Permalink of the last painting post:
function Get_most_recent_permalink(){
global $post;
$tmp_post = $post;
$args = array(
'numberposts' => 1,
'offset' => 0,
'orderby' => 'post_date',
'order' => 'DESC',
'post_type' => 'Painting',
'post_status' => 'publish' );
$myposts = get_posts( $args );
$permalink = get_permalink($myposts[0]->ID);
$post = $tmp_post;
return $permalink;
}
so once you paste that function in your theme’s functions.php file you can just call it whenever you want:
<a href="https://wordpress.stackexchange.com/questions/12143/<?php echo Get_most_recent_permalink(); ?>">last painting</a>