source: twentyfourteen/4.3/sidebar.php

<?php
/**
 * The Sidebar containing the main widget area
 *
 * @package WordPress
 * @subpackage Twenty_Fourteen
 * @since Twenty Fourteen 1.0
 */

?>
<div id="secondary">
        <?php
                $description = get_bloginfo( 'description', 'display' );
        if ( ! empty( $description ) ) :
                ?>
        <h2 class="site-description"><?php echo esc_html( $description ); ?></h2>
        <?php endif; ?>

        <?php if ( has_nav_menu( 'secondary' ) ) : ?>
        <nav class="navigation site-navigation secondary-navigation">
                <?php wp_nav_menu( array( 'theme_location' => 'secondary' ) ); ?>
        </nav>
        <?php endif; ?>

        <?php if ( is_active_sidebar( 'sidebar-1' ) ) : ?>
        <div id="primary-sidebar" class="primary-sidebar widget-area" role="complementary">
                <?php dynamic_sidebar( 'sidebar-1' ); ?>
        </div><!-- #primary-sidebar -->
        <?php endif; ?>
</div><!-- #secondary -->