WordPress/wp-content/themes/twentyfourteen/index.php

<?php
/**
 * The main template file
 *
 * This is the most generic template file in a WordPress theme and one
 * of the two required files for a theme (the other being style.css).
 * It is used to display a page when nothing more specific matches a query,
 * e.g., it puts together the home page when no home.php file exists.
 *
 * @link https://developer.wordpress.org/themes/basics/template-hierarchy/
 *
 * @package WordPress
 * @subpackage Twenty_Fourteen
 * @since Twenty Fourteen 1.0
 */

get_header(); ?>

<div id="main-content" class="main-content">

<?php
if ( is_front_page() && twentyfourteen_has_featured_posts() ) {
	// Include the featured content template.
	get_template_part( 'featured-content' );
}
?>

	<div id="primary" class="content-area">
		<div id="content" class="site-content" role="main">

		<?php
		if ( have_posts() ) :
			// Start the Loop.
			while ( have_posts() ) :
				the_post();

				/*
				 * Include the post format-specific template for the content. If you want
				 * to use this in a child theme, then include a file called content-___.php
				 * (where ___ is the post format) and that will be used instead.
				 */
				get_template_part( 'content', get_post_format() );

				endwhile;
			// Previous/next post navigation.
			twentyfourteen_paging_nav();

			else :
				// If no content, include the "No posts found" template.
				get_template_part( 'content', 'none' );

			endif;
			?>

		</div><!-- #content -->
	</div><!-- #primary -->
	<?php get_sidebar( 'content' ); ?>
</div><!-- #main-content -->

<?php
get_sidebar();
get_footer();