Reformed churches never have an altar. Instead they have a table around which the congregation, which is ecclesiologically "the church", becomes united as the body of Christ when it partakes of Communion (four times a year).
The pulpit and Communion table of the Reformed church in Nümbrecht, colour photograph, 2004, photographer: Roland Steinebach; source: Wikimedia Commons, http://commons.wikimedia.org/wiki/File:Kirche_n%C3%BCmbrecht_altarges.jpg?uselang=de.
Creative Commons-Lizenz Namensnennung-Weitergabe unter gleichen Bedingungen 3.0 Unported.