  In 2012 we announced the House of Graphs (https://houseofgraphs.org)
[Discrete Appl. Math. 161 (2013), 311-314], which was a new database of graphs.
The House of Graphs hosts complete lists of graphs of various graph classes,
but its main feature is a searchable database of so called "interesting"
graphs, which includes graphs that already occurred as extremal graphs or as
counterexamples to conjectures. An important aspect of this database is that it
can be extended by users of the website.
  Over the years, several new features and graph invariants were added to the
House of Graphs and users uploaded many interesting graphs to the website. But
as the development of the original House of Graphs website started in 2010, the
underlying frameworks and technologies of the website became outdated. This is
why we completely rebuilt the House of Graphs using modern frameworks to build
a maintainable and expandable web application that is future-proof. On top of
this, several new functionalities were added to improve the application and the
user experience.
  This article describes the changes and new features of the new House of
Graphs website.
