1200 Years of Italian Sculpture: Gothic: Architectural details predominate in this collection of photographs from Thais.
Earthlore: Gothic Dreams: A lively and illustrated introduction to the monumental churches and cathedrals of the Middle Ages, with a feature on Notre Dame de Paris.
English Heritage: What is Gothic?: An introduction to the style, featuring Whitby Abbey as an example and photographs of all the major Gothic properties in the ownership of English Heritage.
European Route of Brick Gothic: Project aiming to survey medieval buildings in brick in cities around the Baltic Sea and promote a thematic tourist route.
Gothic Architecture: The introduction to Robert Branner's book 'Gothic Architecture' provides an overview of the subject. Hosted by Columbia University.
Gothic Art and Architecture: Serge Helfrich introduces the art form, dominated by the struggle of architecture against gravity, that flourished in Europe from the 12th until the 16th century.
Gothic Dreams: An exploration and study of churches and cathedrals in the Gothic style. Features include: histories, study guides, glossaries and galleries.
Gothic Style Brick Buildings: Information on structures in the Mecklenburg, Vorpommern region of Germany.
Gothic Valle d'Aosta, Italy: Pure Gothic runs rampant in this section of the country thanks to strong German and French influence, seen in a half-dozen color photos from In Italy Online, with description and tourist information.
Medieval Architecture: Clickable thumbnails of photos and drawings illustrating Early Gothic with links to the High Gothic period, from the Digital Archive of Architecture.
Medieval Architecture: High Gothic: Slides of major Gothic buildings from Jeffery Howe's Digital Archive of Architecture: Notre Dame, Chartres; Notre Dame, Amiens; St. Etienne, Bourges; Ste. Chapelle, Paris; Cologne Cathedral.
Medieval French Gothic Architecture and Sculpture: San Jose State University provides an extensive gallery of expandable images, accessed via pull-down menu and selection from an array. Basic information is given for each.
New York Carver: A virtual Gothic cathedral project, featuring articles, photo galleries of Gothic architectural details and an illustrated glossary of terms. Image of the day, screensaver, newsletter, resources.
Romanesque and Gothic Architecture Plans: Spatial proportions compared in detailed layouts, with clickable thumbnails and extensive glossary. From Rice University, Humanities Electronic Studio Project.
Sculpture for Buildings: Medieval Europe: The Metropolitan Museum of Art uses its extensive collection to present an online tutorial.
St. Joseph Messenger: Architecture: For young viewers...a concise answer to the question: What makes it Gothic?
The Birth of Gothic Architecture: Syracuse University provides a visual journey from the birth of French Gothic to pre-Renaissance Italy.
The Nature of Gothic: An extract from John Ruskin's influential book "The Stones of Venice" (1851-3).
Wikipedia: Gothic Architecture: An illustrated description of the origins and characteristics of the style and its variants and revival. It includes a list of notable Gothic structures.