Cohan, Saint-Jean-Baptiste
COHAN

Building Data for Cohan, Saint-Jean-Baptiste

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  • Type: Parish
  • Affiliation:
  •  
  • Region: Picardie
  • Department: Aisne
  • Coords: 49.216, 3.6433
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  • Surveyed: 1977, 1980-83, 2014

Map

Virtual Tour

Timeline and building units for Cohan, Saint-Jean-Baptiste A 'building unit' is an arbitrary unit of work based on bulk billing techniques used by quantity surveyors. The unit is small enough to provide realistic figures in the small churches without becoming too huge in the large. Six units would pay for one small vaulted bay in an aisle about 3 metres square, or a small first-floor gallery. Such a bay would consist of an external wall with a small window, half of two columns about 3 meters tall, the floor and footings under them and the vault and roof overhead.
X

A 'building unit' is an arbitrary unit of work based on bulk billing techniques used by quantity surveyors. The unit is small enough to provide realistic figures in the small churches without becoming too huge in the large. Six units would pay for one small vaulted bay in an aisle about 3 metres square, or a small first-floor gallery. Such a bay would consist of an external wall with a small window, half of two columns about 3 meters tall, the floor and footings under them and the vault and roof overhead.

info

gray gray 20
1170		 79
1180		 110
1190		 gray
1050 1170s 1180s 1190s 1250

Phases for Cohan, Saint-Jean-Baptiste The building sequence is based on my on-site analysis of the construction history, using the techniques developed on the cathedral of Chartres called toichology, and described in a number of publications. The analysis of some of the smaller churches are more approximate than I would like, and need further analysis. <p>I have used 'phase' rather than 'campaign' to to identify a contiguous zone with similar elements. A campaign would be defined by recognisable breaks and construction joints in the fabric: there may be a number of phases within a campaign. One benefit is that separate programs by subcontractors, such as carvers, may be isolated, which is particularly useful in complex sections, such as portals. <p>Every phase has been assigned to a decade, so there may be more than one phase in a decade. <p>While this is certainly imperfect, it will allow us to explore all the data, including costs, across time. This is an on-going process, so as the data continues to be analyzed, the chronology and costing analysis will be further refined, and the synopsis updated. <p>Clicking on any of the decade graphics will display all buildings that had work being done during that decade.
X

The building sequence is based on my on-site analysis of the construction history, using the techniques developed on the cathedral of Chartres called toichology, and described in a number of publications. The analysis of some of the smaller churches are more approximate than I would like, and need further analysis.

I have used 'phase' rather than 'campaign' to to identify a contiguous zone with similar elements. A campaign would be defined by recognisable breaks and construction joints in the fabric: there may be a number of phases within a campaign. One benefit is that separate programs by subcontractors, such as carvers, may be isolated, which is particularly useful in complex sections, such as portals.

Every phase has been assigned to a decade, so there may be more than one phase in a decade.

While this is certainly imperfect, it will allow us to explore all the data, including costs, across time. This is an on-going process, so as the data continues to be analyzed, the chronology and costing analysis will be further refined, and the synopsis updated.

Clicking on any of the decade graphics will display all buildings that had work being done during that decade.
1170

Phase 1 - 1170 - east 6c - 20 Units


Sets out apses to 5 or 6 courses; chapel on south intended, but not built;
1180

Phase 2 - 1180 - apse (d) - 50 Units


Apse and transept walls together with dado arcades and for a much taller building ; stairs same all the way up;
1180

Phase 3 - 1180 - nave 1 - 9 Units


First bay of the nave with thick ribs to chapel and aisle;
1180

Phase 4 - 1180 - apse (v) - 20 Units


Apse and transept vaults in different campaigns with double oculi over triplet windows;
1190

Phase 5 - 1190 [1190] - nave (a), W-w - 70 Units


Nave three bays with west wall, portal, drums and pilasters at each end; built to underside of rose window in one campaign;
1190

Phase 6 - 1190 - nave (c) - 40 Units


Clerestory windows and vaults to above rose; no work on the aisles;
Later

Phase 7 - Later


Tower collapsed into side walls of apse; crossing strengthened and rebuilt with vaults at a lower level;