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lempertz.com

https://lempertz.com· First analyzed 21 May 2026· Updated 21 May 2026
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lempertz.com
Desktop screenshot of lempertz.com
Mobile screenshot of lempertz.com
Mobile

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Hosting Provider

Hetzner
hetzner.com

IP Address

188.40.3.193

Site Location

🇩🇪 Germanyvia phone

Server Location

🇩🇪 Nuremberg, Germany

ASN

AS24940

Organization

Hetzner

Server

Apache

Nameservers

ns3.routing.net.ns2.routing.net.ns1.routing.net.

Performance

92

Core Web Vitals

Weight

First Contentful Paint
1.3 s10%
Speed Index
1.7 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
11.3 MB
192 requests

Image Optimization

Responsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
TYPO3

Technology Stack

8 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Matomo

Libraries

2
jQuery
jQuery UI

CSS Frameworks

2
Tailwind CSS
Bootstrap

Web Servers

1
Apache

SEO Analysis

B79/100
23
5
0
Meta Tags14/15
Content12/12
Headings8/8
Technical22/25
E-E-A-T2/7
Images2/7
Links5/5
URL5/5
Social2/5
Freshness0/4
Mobile4/4
Indexability3/3
L
lempertz.comlempertz.com

Auktionshaus Lempertz - Kunstauktionen in Köln, Berlin & Brüssel

Auktionshaus Lempertz – Kunstauktionen: Kaufen & Verkaufen Sie Kunst international mit kompetenter Beratung und langjähriger Expertise!

Title Length64 chars

Recommended: 50-60 chars (~382px / 580px)

Description Length135 chars

Recommended: 120-160 chars

Issues (0)

    5 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    50 URLs

    50 sub-sitemaps

    robots.txt

    7 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    28/100
    Needs Work
    8 9 1

    Sponsored

    AI & LLM Readiness

    D50/100
    Bot Access
    20/25
    Machine Read.
    11/25
    Schema Data
    6/25
    Citation
    13/25

    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
    nav
    Text ratio:7%
    Words:2,805
    Token eff.:Optimal
    Sections/1K:9.3
    Depth:1/5

    Structured Data

    1 JSON-LD
    Organization×1.1BreadcrumbListSearchAction
    sameAs entity links

    Citation Readiness

    Opening Summary46w
    Descriptive Headingsavg 9.9w
    Canonical URL
    Open Graph1/3
    Twitter Card1/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (8)
    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.
    B
    75/100
    11
    Passed
    4
    Critical
    2
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    15/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    10/15
    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
    9/15
    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.
    2 recommendations
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    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
    F
    1.16 g
    CO₂e / view
    11.3 MB
    Page Weight
    5%
    Cleaner Than
    New Visitor
    1.33 g
    vs
    Returning (cached)
    665 mg
    Annual (10K/mo)
    139.7 kg
    Emission Segments
    Data Center
    57 mg
    Network
    342 mg
    Device
    765 mg
    Resource Breakdown
    JavaScript
    327.2 KB
    Images
    10.2 MB
    CSS
    674.6 KB
    HTML
    34.5 KB
    Green Hosting Verified
    Hetzner Online GmbH
    GWF Verified
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    15%Critical
    Critical / Transactional

    HTTPS

    No WAF

    145d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    DigiCert Inc

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    14.10.2025

    Valid Until

    13.10.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    lempertz.comwww.lempertz.com

    SHA-256 Fingerprint

    25:EA:2A:12:57:A4:90:13:29:56:50:39:9C:86:49:8F:21:AC:8C:28...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(private, no-store, max-age=0)
    content-encoding
    📦 Gzip(gzip)
    content-language
    de-DE
    content-security-policy
    default-src 'self'; script-src 'self' https://www.youtube.co...
    content-type
    text/html; charset=utf-8
    date
    Thu, 21 May 2026 03:07:01 GMT
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    98

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (1)

    lempertz-com.mail.protection.outlook.com

    Domain Information

    lempertz.com

    Domain Age
    28y 9m

    Created

    02.08.1997

    Expires

    01.08.2026

    Last Updated

    02.08.2025

    Registrar

    HTTP.NET INTERNET GMBH

    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

    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.
    C
    65/100
    Mobile Friendly1 breakpoint
    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, initial-scale=1, maximum-scale=2, shrink-to-fit=no
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    EB Garamond + beausite-light

    WCAG AA
    74/100
    Readability
    /30
    26/30

    16px · LH 1.50

    Hierarchy
    /20
    16/20

    2x ratio · ✓ H1→H6

    WCAG
    /25
    23/25

    4.5:1 min contrast

    Performance
    /25
    9/25

    2 fonts · 7 req

    Heading Font

    EB Garamond

    Serif32px

    Body Font

    beausite-light

    Sans16px

    Contrast Ratio

    4.5:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    ~39 CPL

    Narrow lines
    32px
    h1
    36px
    h2
    32px
    h3
    18px
    h4
    16px
    p

    ✅ Excellent readability: 16px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

    ⚠️ Hard to read: Flesch score 42/100. Simplify sentences for wider reach.

    ✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.5:1).

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

    ✅ Strong hierarchy: Headlines are 2.0x larger than body text.

    Buy on MyFontsFluid Type (rem)Flesch 42

    Color Palette

    13 unique colors
    4.6:1 AA Light
    #ffffff
    Primary· 54%
    #737767
    Other· 3.6%
    #1d1610
    Primary· 5.9%
    #9ea98f
    Secondary· 5.5%
    #392e1f
    Primary· 4.1%
    #605845
    Secondary· 3.4%
    #9d8c7d
    Secondary· 3.4%
    #64332c
    Secondary· 2.3%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    14 Resources

    10
    Scripts
    4
    Styles
    1
    Async
    0
    Defer

    Top Script Sources

    local(8)youtube.com(2)

    Website Identity

    Auktionshaus Lempertz - Kunstauktionen in Köln, Berlin & Brüssel

    Auktionshaus Lempertz – Kunstauktionen: Kaufen und Verkaufen Sie Kunst international mit kompetenter Beratung und langjähriger Expertise!

    consign@lempertz.com
    +492219257290
    www.lempertz.com/de/
    28 years old
    Location detected: 🇩🇪 Germanyvia phone
    HTTP.NET INTERNET GMBH📧 Microsoft 365de

    Sponsored

    Last analyzed: 21 May 2026 at 03:07

    Historical Analysis & Change Tracking