172 THE
ARCHITECTURE OF HUMANISM
isnot
merelythat
theleastworthyfactsarestudied
most, and that the stress falls
rather on what
is
historiallyilluminating than on what is beautiful.
Theprejudiceis moreprofound. Forevolution
was
schooled in
the study of biology;
and
historical
criticism, when it deals in values at all, tends
un-
consciously toimposeonarchitecture thevalues
of
biology.
Renaissancearchitectureisblamed,inthe
general, because it is sdf-guided and
'
arbitrary
'
;
yetitiscondemned,in
the
particular,
bytheunjust
dooms
of
'
necessary
'
law. Let us take a typical
presentationofthestyle,andseehowthisoccurs.
Thearchitectureofthe Renaissance, we are
told,
and rightly, falls
into three fairly distinct periods.
There
is the period of the Florentine Renaissance
—
^the period of the
quattrocento—tentative, experi-
mental,hesitating,
withacertainnaivequalitythat
makes for
charm but hardly for accomplishment
:
theperiod ofwhich Brunelleschi
istheoutstanding
figure. Ofthismanner
ofbuildingthePazziChapel
isthe
earliestpureejcample,andthe
'
Carceri
'Church
of
GuilianodaSangallo,
atPrato, oneofthelatest.
Thisisthe
periodofimmaturity.
The second period
is that of Bramante and of
Raphael. It
is much more sure
of itself; its
aim
is clearly
defined and
supremely achieved. The
tentative Brunelleschian
charmhasvanished, anda
moreassuredand
authoritative
mannerhastakenits