Peter Morgan’s stunning — and stunningly inventive – series, “The Crown,” which profiled the extraordinary and lengthy reign of Queen Elizabeth II, now concludes with its final two-part Season 6 beginning Nov. 16.

It all began in 2006 with Morgan scripting Helen Mirren’s Oscar-winning theatrical movie “The Queen” and, more importantly, its 2013 theatrical spin-off “The Audience,” again with Mirren, which noted the passages of her reign in weekly meetings with various Prime Ministers.

That notion of looking at her reign as one decades-long story led to this ambitious and extraordinarily expensive series. “The Crown” launched with Elizabeth’s 1947 marriage to Prince Philip, her first-ever televised coronation and the drama of her sister Margaret giving in to familial and religious pressure and not marrying the divorced Peter Townsend.

“The Crown” continued to the dawn of the 21st century, following Princess Diana’s death and Prince Charles’ relationship with Camilla Parker Bowles.

What was ingenious – and had never been done previously — was that every two seasons the principal roles were recast as they aged.

Also, each 10-episode season would have a different theme for each chapter, whether illustrating a different aspect of the Royal family, from their hidebound traditions, lavish lifestyles, romantic and political scandals to the events that shaped not just how the Royals behaved and appeared but also a nation’s image of itself.

It is clear from his treatment of the often maligned Prince Charles that Morgan rates as a Royalist, a defender not a challenger of the status quo. As he ends “The Crown” Charles is presented in a mostly positive light, a Royal who justified his existence and patience with service and innovation.

When “The Crown” began no one really knew if it could succeed in its ambitious intentions.  No one knew if the public would respond, not just favorably but with continued interest as the decades passed and new faces supplanted their forerunners.

“The Crown” minted new stars in Claire Foy’s young Elizabeth of Seasons 1 and 2, alongside Vanessa Kirby’s tragic romantic, sidelined sister Margaret to Seasons 3 and 4 with Emma Corrin and Josh O’Connor radiantly vivid as Diana and Charles.

Morgan excavated late 20th century history as he covered Elizabeth’s record-breaking reign. In reporting about many things, including the decadent lifestyle of Antony Armstrong-Jones, the bisexual society photographer Margaret married, a commoner very much familiar with hearty party times, Morgan was accused of being a gossip. And, often, historically inaccurate.

Still, there was much in “The Crown” that was retrieved from the dustbin of history – and much that was debated, especially in the UK.

As this series ends, there is talk of a prequel “Crown,” one that would begin with Queen Victoria’s death in 1901 and continue to Elizabeth 1947 wedding, completing a circle.

The final season of “The Crown” on Netflix streams 5 episodes Nov. 16, and the final 5 on Dec. 14