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chateaunantes.fr

https://chateaunantes.fr· First analyzed 14 May 2026· Updated 14 May 2026
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chateaunantes.fr
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Mobile

Sponsored

Hosting Provider

Alfa-Safety SARL

IP Address

217.147.199.224

Site Location

🇫🇷 Francevia tld

Server Location

🇫🇷 Nantes, France

ASN

AS20529

Organization

Alfa-Safety SARL

Nameservers

ns-43-c.gandi.net.ns-240-a.gandi.net.ns-110-b.gandi.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
460 ms10%
Speed Index
598 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.3 MB
50 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms
CHATEAU NANTES 2020v1.0Custom
by Anima. based on a work by the WordPress team
View Theme

Technology Stack

7 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Matomo

Libraries

1
jQueryv3.3.1

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Plugins

1
Yoast SEO

SEO Analysis

A83/100
23
7
0
Meta Tags15/15
Content10/12
Headings8/8
Technical25/25
E-E-A-T2/7
Images2/7
Links2/5
URL5/5
Social4/5
Freshness4/4
Mobile3/4
Indexability3/3
C
chateaunantes.frchateaunantes.fr

Château des ducs de Bretagne | Musée d’histoire de Nantes

Le Château des ducs de Bretagne : le musée d'histoire de Nantes, l'agenda des expos et événements. Préparer sa visite : horaires, tarifs et billetterie.

Title Length57 chars

Recommended: 50-60 chars (~349px / 580px)

Description Length152 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    6 URLs

    6 sub-sitemaps

    robots.txt

    10 rules

    Local SEO

    Local Search Readiness

    33/100
    Needs Work
    10 9

    Sponsored

    AI & LLM Readiness

    D47/100
    Bot Access
    20/25
    Machine Read.
    7/25
    Schema Data
    8/25
    Citation
    12/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    Text ratio:7%
    Words:2,762
    Token eff.:Optimal

    Structured Data

    5 JSON-LD
    Organization×1.1WebSiteBreadcrumbListSearchAction
    sameAs entity links

    Citation Readiness

    Opening Summary241w
    Descriptive Headings
    Canonical URL
    Open Graph3/3
    Twitter Card1/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (10)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    A
    86/100
    14
    Passed
    2
    Critical
    0
    Warnings
    Images & Alt Text
    18/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    17/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    15/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    15/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    6/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    38/100
    C
    161 mg
    CO₂e / view
    1.3 MB
    Page Weight
    70%
    Cleaner Than
    New Visitor
    184 mg
    vs
    Returning (cached)
    92 mg
    Annual (10K/mo)
    19.3 kg
    Emission Segments
    Data Center
    36 mg
    Network
    39 mg
    Device
    87 mg
    Resource Breakdown
    JavaScript
    56.5 KB
    Images
    942.1 KB
    CSS
    287.9 KB
    HTML
    16.1 KB
    Green Hosting Not Verified
    Alfa-Safety SARL
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    D

    Security Score

    56%Poor
    Interactive

    HTTPS

    No WAF

    61d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    15.04.2026

    Valid Until

    14.07.2026

    Subject Alternative Names (1)

    www.chateaunantes.fr

    SHA-256 Fingerprint

    C2:0D:3D:D5:00:8C:22:0E:96:4A:64:77:75:CA:61:33:C0:80:27:95...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-store, no-cache, must-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-length
    16162
    content-type
    text/html; charset=UTF-8
    date
    Thu, 14 May 2026 00:13:45 GMT
    expires
    Thu, 19 Nov 1981 08:52:00 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    68

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (4)

    mx01.cloud.vadesecure.com
    mx02.cloud.vadesecure.com
    mx03.cloud.vadesecure.com
    mx04.cloud.vadesecure.com

    Domain Information

    chateaunantes.fr

    Domain Age
    20y 8m

    Created

    02.09.2005

    Expires

    29.03.2027

    Last Updated

    22.03.2026

    Registrar

    GANDI

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookiebot

    Cookie Consent Banner
    Cookiebot
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookiebot
    Privacy policy page linked
    Legitimate interest basis mentioned

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    B
    71/100
    Mobile Friendly24 breakpoints
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, user-scalable=0, initial-scale=1.0
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    DIN

    WCAG Partial
    70/100
    Readability
    /30
    20/30

    20px · LH 1.40

    Hierarchy
    /20
    18/20

    3.6x ratio · ✓ H1→H6

    WCAG
    /25
    17/25

    1:1 min contrast

    Performance
    /25
    15/25

    2 fonts · 3 req

    Heading Font

    DIN

    Sans72px

    Body Font

    DIN

    Sans20px

    Contrast Ratio

    1:1

    6 issues

    Reading Comfort

    ~39 CPL

    Narrow lines
    72px
    h1
    64px
    h2
    40px
    h3
    19px
    h4
    20px
    p

    ✅ Excellent readability: 20px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

    ❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 1.0:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 3.6x larger than body text.

    Buy on MyFontsFluid Type (rem)Flesch 0

    Color Palette

    5 unique colors
    Light
    #ffffff
    Background· 29.599999999999998%
    #070b0d
    Primary· 36.7%
    #171c1e
    Text· 24.2%
    #8088a9
    Secondary· 4.9%

    Business & Marketing Stack

    3 Tools Detected

    Advanced

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    Privacy & Cookies

    1
    CookiebotMid-Market

    Cookie consent and privacy compliance tools

    2

    Categories

    3

    Total Tools

    0

    Enterprise

    1

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Sponsored

    Scripts & Styles

    19 Resources

    14
    Scripts
    5
    Styles
    5
    Async
    0
    Defer

    Top Script Sources

    chateaunantes.fr(10)consent.cookiebot.com(2)googletagmanager.com(2)

    Website Identity

    Château des ducs de Bretagne | Musée d’histoire de Nantes

    Château des ducs de Bretagne | Musée d’histoire de Nantes

    Organization

    Le Château des ducs de Bretagne : le musée d'histoire de Nantes, l'agenda des expos et événements. Préparer sa visite : horaires, tarifs et billetterie.

    0811464644
    www.chateaunantes.fr/
    20 years old
    Location detected: 🇫🇷 Francevia tld
    GANDIfr-FR

    Sponsored

    Last analyzed: 14 May 2026 at 00:14

    Historical Analysis & Change Tracking