functions.php

<?php

add_action( 'init', 'create_my_post_types' );

	function create_my_post_types() {
	
		register_post_type('exhibition', array(
		'labels' => array(
			'name' => __( 'Exhibitions' ),
			'singular_name' => __( 'Exhibition' ),
			'add_new' => __( 'Add New' ),
			'add_new_item' => __( 'Add New Exhibition' ),
			'edit' => __( 'Edit' ),
			'edit_item' => __( 'Edit Exhibition' ),
			'new_item' => __( 'New Exhibition' ),
			'view' => __( 'View Exhibition' ),
			'view_item' => __( 'View Exhibition' ),
			'search_items' => __( 'Search Exhibitions' ),
			'not_found' => __( 'No Exhibitions found' ),
			'not_found_in_trash' => __( 'No Exhibitions found in Trash' ),
		),
		'public' => true,
		'show_ui' => true,
		'publicly_queryable' => true,
		'exclude_from_search' => false,
		'menu_position' => 20,
		'menu_icon'   => 'dashicons-star-filled',
		'query_var' => true,
		'rewrite' => array( 'slug' => 'exhibitions', 'with_front' => false ),
		'supports' => array( 'title', 'editor', 'thumbnail' ),	
		'has_archive' => 'exhibitions'
		) );
		
	}
	
	
?>