Open era or Open Era may refer to:

Open era or wide-open era, may also refer to:

Open may refer to:

An era is a commonly used word for long period of time. When used in science, for example geology, eras denote clearly defined periods of time of arbitrary but well defined length, such as for example the Mesozoic Era from 252 Ma–66 Ma, delimited by a start event and an end event. When used in social history, eras may for example denote a period of some monarch's reign. In colloquial language, eras denote longer spans of time, before and after which the practices or fashions change to a significant degree. When era is extended to a calendar system, it is known as a calendar era. In Sanskrit or Indian culture eras are known as Yugas.

In chronology, an era is the highest level for the organization of the measurement of time. A calendar era indicates a span of many years which are numbered beginning at a specific reference date (epoch), which often marks the origin of a political state or cosmology, dynasty, ruler, the birth of a leader, or another significant historical or mythological event; it is generally called after its focus accordingly as in Victorian era.

Stefanie Maria "Steffi" Graf (born 14 June 1969, in Mannheim, Baden-Württemberg, West Germany) is a former World No. 1 German tennis player.

In total, Graf won 22 Grand Slam singles titles, second among male and female players only to Margaret Court's 24. In 1988, she became the first and only tennis player (male or female) to achieve the Calendar Year Golden Slam by winning all four Grand Slam singles titles and the Olympic gold medal in the same calendar year.

Graf was ranked World No. 1 by the Women's Tennis Association (WTA) for a record 377 total weeks—the longest period for which any player, male or female, has held the number-one ranking since the WTA and the Association of Tennis Professionals began issuing rankings. She also holds the open era record for finishing as the year-end World No. 1 the most times, having done so on eight occasions. She won 107 singles titles, which ranks her third on the WTA's all-time list after Martina Navratilova (167 titles) and Chris Evert (154 titles).

Paweł Althamer (born 1967) is a contemporary Polish sculptor, collaborative artist, and creator of installations and video art. In 2000 he participated in Manifesta 3 in Ljubljana, Slovenia. He won the Vincent Award in 2004. In 2007 he presented the exhibition One of many with the Nicola Trussardi Foundation.

His longest-running collaboration is with the Nowolipie Group, an organisation in Warsaw for adults with mental or physical disabilities, to whom he has been teaching a Friday night ceramics class since the early 1990s. In 2008 Althamer arranged for the group to wear matching overalls and take a trip on a biplane, which became the subject of a short film by Althamer’s frequent collaborator, Artur Żmijewski (Winged, 2008).

Althamer was part of the so-called Kowalski Studio at the Warsaw Academy of Fine Arts, along with many of today’s leading generation of Polish artists, including Artur Żmijewski and Katarzyna Kozyra. Under the working title ‘Common Space—Private Space’, Kowalski foregrounded the work of art as an effect of complex non-verbal communication performed by artists in interaction with each other, neutralising individualism: ‘each of the participants had at his/her disposal “a space of their own” […], where they could build elements of their own visual language, and the “common space” open to everyone, where they could conduct simultaneous dialogues with the other participants. All without using words.’