Architects – at least conscientious ones – have long wrestled with the problem of making overtly modern additions coexist harmoniously with more traditional structures. Below is an example of an addition to a church building which incorporates details which I think were both clever and at least somewhat successful in their attempt to relate to the original structure.
The original portion, built in a vernacular interpretation of the Italian Renaissance Revival style, featured numerous stained glass windows – many of which were patterned with an amber field interspersed with blue diamonds. When a large addition was added to the side and rear of the church mid-century, the architect picked up on this glass patterning and utilized it in a distinctly modern way – within the narrow sidelights flanking modern plate glass windows. The beauty of this is that the stained glass would help the addition relate to the interior spaces of the main building as well as the exterior.
Unfortunately, there is an ironic twist in the last image below.