Changes

<center>For lessons on the [[topic]] of the '''''Heart''''', follow [http://nordan.daynal.org/wiki/index.php?title=Category:Heart this link].</center>

<center>For lessons on the [[topic]] of the '''''Heart''''', follow [https://nordan.daynal.org/wiki/index.php?title=Category:Heart this link].</center>

==References==

==References==

*[http://www.slate.com/id/2159800/?GT1=9129 The Shape of My Heart: Where did the ubiquitous Valentine's symbol come from?] by Keelin McDonell, [[Slate (magazine)|Slate.com]].

*[https://www.slate.com/id/2159800/?GT1=9129 The Shape of My Heart: Where did the ubiquitous Valentine's symbol come from?] by Keelin McDonell, [[Slate (magazine)|Slate.com]].

*[http://www.heartsymbol.com www.heartsymbol.com: The Heart Symbol - Origin, History And Significance] by Prof. [[Armin Dietz]]

*[https://www.heartsymbol.com www.heartsymbol.com: The Heart Symbol - Origin, History And Significance] by Prof. [[Armin Dietz]]

*The shape of the heart, by Pierre Vinken, Amsterdam 2000.

*The shape of the heart, by Pierre Vinken, Amsterdam 2000.

*How the heart was held in medieval art, by Pierre Vinken, The Lancet, 358, 22, december 2001, 2155-2157.

*How the heart was held in medieval art, by Pierre Vinken, The Lancet, 358, 22, december 2001, 2155-2157.