https://codex.wordpress.org/Template_Tags
Template tags files are stored in the wp-includes directory. The files have the suffix of “-template.php” to distinguish them from other WordPress files. There are 9 template tags files:
- wp-includes/general-template.php
- wp-includes/author-template.php
- wp-includes/bookmark-template.php
- wp-includes/category-template.php
- wp-includes/comment-template.php
- wp-includes/link-template.php
- wp-includes/post-template.php
- wp-includes/post-thumbnail-template.php
- wp-includes/nav-menu-template.php
