3 1 Further Notes and Views

The trefoil is perhaps the easiest knot to find in "nature", and is topologically equivalent to the interlaced form of the common Christian and pagan "triquetra" symbol [12]:

Logo of Caixa Geral de Depositos, Lisboa [1]

A knot consists of two harts in Kolam [2]

A basic form of the interlaced Triquetra; as a Christian symbol, it refers to the Trinity

Thurston's Trefoil - Figure Eight Trick [3]

Further images...

A Knotted Box [4]	A trefoil near the Hollander York Gallery [5]	A Knotted Pencil [6]	The NeverEnding Story is a connected sum of two trefoils. [7]
Banco Do Brasil [8]	A hagfish tying itself in a knot to escape capture. [9]	One version of the Germanic "Valknut" symbol	A Kenyan Stone [10]
Ribbons (straight lines and 2/3 circles)	Ribbons (circular arcs)	Tightly-knotted form	Square depiction
Mike Hutchings' Rope Trick [11]