On occasion of the formation of the Alps, the fossilized sediments material of the body of water between the Ricken and Etzel chains unfolded.

There arose the typical rock bands that form the Lindenhof hill in Rapperswil, or the islands of Ufnau, Lützelau and Heilighüsli.

In 1st and 2nd century, the remains of a Roman temple are dated, broken during Alamannic occupation of the Swiss plateau.

In 926 or some years later, St. Peter & Paul church' preceding building was given by the Hunfridings noblewoman Reginlinda and Burchard II, Duke of Swabia, in addition with a house for herself and her son Adalrich.

Historians mention a 10th-century ferry station assumably at the so-called Einsiedlerhaus in Rapperswil – in 981 AD as well as the vineyard on the Lindenhof hill – between Kempraten on lake shore, Lützelau and Ufenau island and assumably present Hurden, which allowed the pilgrims towards Einsiedeln to cross the lake before the prehistoric bridge at the Seedamm isthmus was re-built in 1358.

For hundred of years, it was the parish church for the people living in the surrounding villages of Lake Zürich's upper shores.

One year later, Klarer convinced Zwingli, to refuge Ulrich von Hutten on Ufenau, where he died in seclusion.

Until the early 14th century, both churches were also important cultural and intellectual centres for the communities dotted around Lake Zurich.

A small wooden bridge to Hurden is mentioned until 1430, so-called «Kilchweg in die Uffnow» meaning pathway to the Ufenau church.

[8] The Abbey submitted a planning application on 14 August 2015 and estimated a total cost of 6.5 million Swiss francs, then hired architects Pius Bieri and Frank Roskothen to lead the work.

Since 1993 Ufenau is a «Moorlandschaft von besonderer Schönheit und nationaler Bedeutung», i.e. a bog environment of extraordinary beauty and national importance.