The Sentence Diagram Generator visually represents the sentence "The Renaissance was a time when the arts flourished in Western Europe." as follows:

                +---------------------+
                |       was           |
                +---------------------+
                       |
          +------------+-------------+
          |                          |
    +-----+-----+              +-----+-----+
    |  The      |              |  a       |
    |  Renaissance|             |  time    |
    +------------+              +-----------+
                                   |
                                   +---------------------+
                                   |       when          |
                                   +---------------------+
                                           |
                                   +-------+-------+
                                   |               |
                             +-----+-----+   +-----+-----+
                             |  the      |   |  flourished |
                             |  arts     |   +-------------+
                             +-----------+         |
                                                  +-------------------+
                                                  |   in              |
                                                  +-------------------+
                                                          |
                                                      +---+---+
                                                      |Western |
                                                      |Europe  |
                                                      +--------+