Johann Friedrich I, the Magnanimous, Elector of Saxony

- beech wood

- all four edges are chamfered on the reverse, width of chamfer c. 1.6 cm

- the reverse exhibits an almost opaque black coating

- Dendrochronology: the following measurement were recorded for the single beech wood panel: 87 annual rings, 1519-1433. The panel is from the same tree as planks used for the following paintings:

DE_smbGG_589 (I,II,III); DE_KSVC_M416 (III); DE_BStGS_WAF167 (I, II, III); DE_KBSB_B60; DE_KBSB_B59; DE_SKK_0109; DE_SMG_SG17; DE_LmKKO_15-572 (I, III); DE_HLMD_GK73a; US_IMA_2000-344; DE_smbGG_564 (I, II, III); FIN_FNG_S-1994-224; F_MdLP_1180; DE_KSW_G6; US_PMA_739 (II); DE_SWK_6545; AT_KHM_GG883; DE_BStGS_6262 (II, IV); DE_BStGS_6264 (II, IV); US_artic_1938-310 (III); Martin Luther, Privatbesitz (I, II, III)

The youngest annual ring is from the year 1524. Generally with beech wood the entire section is used and only the bark is removed, therefore a felling date of 1524 can be estimated. The wood was then seasoned for at least two years and could have been used after 1526. (Klein 2016).

- chalk ground

[Cat. Coburg 2018, 142]

Identification of wood species: beech wood

Dendrochronology: plank III 44 annual 1520 -1477

The youngest annual ring is from 1524 (see the meaasurements of other panels from the same tree).

[Klein report, 03.03.2016]

Support:

• some old woodworm damage (inactive)

Paint layers:

• various tiny point retouches

Varnish:

• numerous applications of a glossy resin varnish. The painting was varnished while fixed in its frame. This caused a distinct difference in colour from green (edge) to a bluish hue (varnished surface), which was promoted by the fact that the edges were concealed behind the rebate of the frame.

[Cat. Coburg 2018, 142]

Conservation treatment (in the studios of the Doerner-Institute/Bavarian State Collections (Bayerische Staatsgemäldesammlungen), Munich)

[Cat. Coburg 2018, 142]

Conservation treatment

[Cat. Coburg 2018, 142]